Great list so far, I would agree with many things on it. Found a slight mistake tho:

Originally Posted by vometia

[*] Dice rolls: these should have the bonus/penalty modifier added to the value of the dice rather than subtracted to the target. Apparently this is not just a subjective matter but contradicts the D&D rules that rolling a 1 is an automatic fail no matter what.

Natural 1s and 20s as in automatic failure and success are only a thing in Attack Rolls and Death Saves. A skillcheck with a 1 is not an automatic failure. If you have a +9 modifier you will never have to roll for any skill check 10 or lower, as it would be a success no matter the roll.