By itself +17 is in the d20 range. But it's not by itself. It's been previously gone over that additional bonuses are all over the place in 5e. Guidance d4s, Bardic Influence d6's, advantage is virtually +4.5, and that's not getting into luckstones, tomes, or that ioun stone of mastery.
Also, um, what level 20 Rogue doesn't have a 20 Dex or higher? You say the floor is 22, but isn't 27 more realistic?
For dex based stuff, yes.
Anyways. The fact of that matter is, +6 is a hefty bonus in 5e. Expertise, which is not Rogue-exclusive, basically means this:
Non-Expertise, max stat: +11. Can get DC 20 60% of the time, DC 25 35% of the time, and DC 30 10% of the time.*
Yes.
Expertise, max stat: +17. Can get DC 20 90% of the time, DC 25 65% of the time, and DC 30 40% of the time.
Yes.
Expertise, max stat: +17, with Reliable. Can get DC 20 100% of the time, DC 25 100% of the time, and DC 30 40% of the time.
Yes.
*Numbers may not be accurate, math brain still not fully awake.
Accurate enough.
My issue with this is, if the game has DC 20 and up checks, Expertise is basically a must-have.
No. I disagree. With help and other ways to t advantage and the occasional guidance and heroic inspiration, DC 20 is manageable for most characters if the specialists are unavailable.
I'm not including other forms of bonuses because whether or not they exist is equally up in the air based on party composition- even Help is not guaranteed since there are DM's who only allow proficient characters to take the Help action out there. And if you can afford a Feat to boost a skill check, you can have Expertise.
Ok. I should have read further. I basically agree. The question is, why do want to challenge the high level rogue all the time? They are no wizards that can cast spells nearly at will at those levels trivializing a lot.
IF utility spells would cost more than a low level slot or 10 minutes, why should the highest level rogue and specialist still fail at those tasks. Maybe reliable talent is not the best way, because it makes certain checks auto successes while it does not help for other checks with only a few DC points higher at all.
So replacing it with something else (maybe some extra dice to spend to boost their checks)
Reliable isn't really the problem here as much as Expertise is, but if your game has DC 25 checks, it's still equal to a +7 bonus, which again, is massive. It's not quite "have Rogue or go home" but it's close.
I disagree. I think expertise is spot on. Reliable talent is either boring or useless as explained above.
The game isn't supposed to be built so that any given class is a must-have. But if very difficult checks are in the game, you must have an Expertise user, an optimized party, or some means (probably magic) to circumvent the skill check.
I don't think so. There seems to be only one class that is not that great at either magic or skills... the monk. But even they have ways to get around many obstacles.
Using skills is just the rogue's thing. As it always was.
Now the easy solution is not to have these kinds of skill checks if your party can't handle them. But that's basically giving the party a virtual Rogue lol!
Or you just have that challenge and the PCs find a way around that. As it is always possible in this game. Or it just takes more time.
And that's the crux of the issue for me. I can't punish a party for not playing a Rogue or not making sure they have Expertise for whatever kinds of super difficult checks may or may not exist in the game.
Then don't use super high DCs. The rogue does not see the difference between DC 15 and 25 anyway after getting reliable talent.
But if the game never has super difficult checks, then you don't need Expertise!
For everyone but the rogue expertise is great.
The ability is basically warping the game around it's existence, creating two wildly different scenarios if it's in play or not!
A +6 bonus at highest level is not a lot better than advantage. For most levels, it is just raising the chance by 30%. For most levels that are played, where skills are competing with magic (because slots are still limited) it is just a 15% higher chance to succeed...