So, what you are saying is that class balance is only important when comparing the varying conditions that support your argument, but any varying conditions that do not support it are exempt from their effect on class balance?
The difference is he is comparing apples with apples: Defenders that use AEDU to defenders using the non-AEDU structure. You're trying to make some argument that different roles excel in different ways so AEDU wasn't balanced - which is nonsensical. A wizard should be better against minions because - this is actually a stated design thing BTW - controllers are *meant* to kill minions. The ranger naturally does far better against a solo, because strikers are designed to kill single enemies quickly and extremely efficiently. You shouldn't confuse roles in the party and balance: 4 roles combine to produce an effective party. How a character is compared is with those within their own roles: not outside of them.
Comparing how the Slayer performs to say, a Ranger is a more valid and worth while comparison. Both are strikers and one has very different conditions they work under. Of course, I actually disagree that the Slayer is going to be competent against the Ranger - especially once the ranger builds his bunch of cheesy out of turn interrupt attacks. The Slayer has a decent minimum threshold per encounter for DPR, but the maximum damage is far lower than the Ranger - who when he goes banana's will
really blow a ton of DPR. This is part of the problems with the non-AEDU Slayer/Knight/Thief in that without charge tricks, their DPR is competent all day long - but not remarkable enough compared to other strikers.
This has strengths and weaknesses. In Tony's case, I suspect he puts a lot of weight on the all day long competence of these classes. For me, I put a lot more weight on how they will perform when the going actually gets tough. I find in such encounters their lack of options and simply performing the basics - albeit extremely well - isn't going to be enough.
A great example of this is the first of the "essentials" DnD encounters seasons vs. the level 4 solo black dragon. To say that the essentials party got annihilated in a good amount of cases would be an understatement. The Knight was simply unable to do a thing about the dragon, the thief was good DPR but once again came up chronically short on actually being able to deal with the dragons powers. The Warpriest and Mage would be fine though - as they are still AEDU - and I can never remember what the last character was (Maybe a scout?). I'm not surprised that party got ruined though.
Running this same encounter with one of my own groups, the party of Fighter/Ranger/Warlord/Barbarian/Invoker were also really badly hammered - but won without the major risk of a TPK. The simple reason is that with more tactical options came workarounds - the fighter could stay at range and mark the dragon with a handaxe to avoid the automatic hit acid. Keeping the -2 penalty on, combined with an at-will from the invoker that also put a -2 penalty on made a huge difference. A successful Warlord Lead the Attack combined with the Barbarian/Rangers sinking in multiple attack dailies/encounters tore the dragon down while bloodied very quickly - again minimizing the amount of damage.
These differences don't look important - but again when the going gets tough being able to step up and perform at X level
is important. The difference between the essentials martial strikers like the scout/thief/slayer and say, your normal strikers is they are very consistent but entirely unremarkable. When you need them to really step up and toss a big amount of damage around - what those big dailies and other encounter powers can accomplish - they can't do it. Their minimum performance and maximum performance is very close -
by design.
An AEDU class has a big gulf between minimum and maximum performance - due to extra damage being in unreliable ways like dailies and encounters. But when they come off with their dailies and encounter powers, they accomplish far stronger effects and far more upper performance. When the going gets tough, that party can throw down a lot of dailies and really hammer home just how big their advantage is. Hence why when I tried that Black Dragon encounter that wiped so many tables in the essentials only encounters season, it wasn't so bad - if still very challenging - for my regular party.
At the same time that party above if they faced that dragon when they don't have dailies and you have a long adventuring day, they would get
hammered. In the same scenario the advantage would entirely shift and the essentials classes plain excel - they are practically immune to whatever happens during the day. So here is more towards Tony's point about balance - because if you have a short day the AEDU classes will annihilate the essentials martial classes in power. On the other hand, the longer and more grindy the day - where resources become more stretched the E-martial classes don't change in performance.
So there is a balance issue here - if a
very subtle one and how important it is in gameplay is
extremely hard to assess. A fully rested and without expending any dailies AEDU party, that can freely dump it on the black dragon I used as an example will do very well (and in fact did). That same party that has had say, 50% of its total powers depleted over the day? That's a much more interesting proposition. On the other hand your Warpriest/Mage/Knight/Thief/Slayer party is a very different prospect facing that dragon at the end of a long adventuring day. At least 3/5 members of the party don't care how many encounters they've faced that day.
Speaking of, take the parties above and switch out the essentials warpriest with the Warlord (Marshal). Now I have to wonder: How much more effective is that Knight/Thief/Slayer/Mage party with the Warlord replacing the Warpriest? Something to think about there. Then of course there will be the difference in epic tier and believe me, when you can recycle dailies/encounter powers more easily the AEDU classes will gain power as they become less at the mercy of the adventuring day (especially compared with low levels). A key thing to remember in these debates is powers like power strike, backstab and similar while reliable - are immensely unremarkable and very hard to recycle by the normal epic tier means.