It doesn't MATTER whether you calculate 6 additional defenses, or just use the stats straight. 6 NADs is the opposite of streamlined, elegant design, especially when those NADs will be determined, according to the default book, by 4d6d1!
That's the problem here. There is nothing streamlined, elegant, or balanced about that design. It's messy, stupid, random, and it's going to randomly kill off characters for no discernible reason.
This is stupid design, messy faux-realistic design and stupid messy faux-realistic design is pretty much the polar opposite of 4E design.
I think that this matters more for transient bonuses than permanent ones. Which kind of brings up another design idea that I am beginning to like -- declaring war on the transient bonus. It maximizes complexity and, when it is +1 or +2, does so for a very small shift in the odds.
No, it is NOT inevitable. 4E has the equivalent in Passive Insight and Passive Perception, and after four years of crunch-bloat I am not aware of a single thing that modifies Passive Insight independently of Insight, or Passive Perception independently of Perception. Likewise, 4E has exactly zero effects that modify your ability scores.
If the designers can muster the discipline to achieve that in 4E, I see no reason they can't do something similar in 5E. 3E was an object lesson in why cascading modifiers are bad.
The point about wanting to play a system that doesn't use the six basic stats still applies.
Remember, SOD is coming back. Save versus death DC 15 at a -1 penalty!So, I rolled an 8 and I had to put it in some ability score or other and now there's simply no way I can ever compensate for my weakness? The cleric can't buff it, I can't hide behind a bush, I can't wear a ring, drink a potion, etc? That's going to fly. Yes, that will most certainly fly.
Frankly I'm not averse to there being quite limited ways to transiently modify things. I think it is a fine idea to keep that down to a dull roar, but there is really no chance there are not going to be circumstances where some modifier needs to be used. If the only mod available is to the ability score itself, that's a REAL PITA. It is also WEIRD. I hide behind a bush and my DEX goes up? I'm pretty sure that won't happen. Thus again we arrive at the fallacy of the hidden number.
So, which is it? BOTH A AND B are worse than what 4e has, inarguably. This is the problem. Every variation of A and B are ALL worse than what 4e has. There is simply no way around this.
And are you seriously trying to imply that the game will simply blanket eschew ANY modifier of any kind to defenses and there will be NOTHING but static modifiers to ability scores than only change with level up?
We don't know if there will be any blanket +X to Cha saves type modifiers. I hope there will not. +5 against poison, OTOH, is no different from 4e. It doesn't matter if it applies to Fort or Con.
All I'm saying is that you *assume* they will choose A or B, when we don't really know that they will.
OK, there's a third choice between "this is on your sheet" and "this is not on your sheet"?
Lets examine this other option further. OK, so now I have a bonus against 'poison'. How many of these different bonuses will I have? Which ones will apply? If there's NO OTHER WAY to have bonuses in 5e then presumably these will be fairly common. If they are so rare that I probably can't get one, then we're back where we were before.