AbdulAlhazred
Legend
You keep acting like this is some kind of new, additional burden being placed upon you. You had six stats and AC from the very beginning. In fact, you originally had five saving throw categories as well.
3E reduced that number - you now had your six stats, your AC (and some variants) and your three saves.
In 4E you had six stats, AC, and three "defenses".
Now you just have six stats and AC.
Why is this somehow adding complexity?
Is this simply concern about the possibility of having to use a low stat for defense?
Here's the real problem with this whole concept. It IS 7 defenses and they ARE separate things from the ability scores. This will be true unless you assume that there will NEVER EVER be any adjustments to those numbers. Are you telling me that no race, class, or item will EVER statically modify those numbers? REALLY? Because if it does then I need to have a box on my sheet where I can write down that modified number. What is that box going to be called? How will the rules refer to it? Will they call it "that number that is your ability score plus modifiers?", lol. No, it will be a DEFENSE, and it will be IN ADDITION TO the ability score. Failing to give it a name just makes things WORSE, not better. This is the idiot logic by which we seem to be operating so far with 5e. Pardon us if we're NOT impressed.
In all fairness maybe these design mistakes will be corrected. Still, given that they stem from statements made BY the designers, we can be pardoned for rolling our eyes at this nonsense.