ezo
Hero
Sure. One of the things about 5E is using the d20 concept but keeping it bounded so the maths never becomes very difficult for most players. However, in another way they made it more difficult. Now, instead of using larger numbers in the attack process, hit point bloat leads to larger numbers in the damage vs. hit point maximum calculations.THAC0 works I prefer not to use it. It's not a requirement eg I was joining a pre 3E game.
I don't use it even in 2E but don't care if others do and it's not a deal breaker.
Research can always be done to suggest the point you want to suggest.The point is evidence exists that addition is easier than subtraction.
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At any rate, if you find a study that is well-done and provides evidence at the level AC is calculated in 5E, with the wide range of the population that 5E involves and in the condition 5E is played, then I will care.

In the meantime, WotC should be promoting adding damage instead of subtracting it (considering in practice these are often larger--and thus often more complex--values, the evidence exists it would be easier) until a hit point maximum is reached; but they are not.