I like the second part of the idea better than the first one. I believe it has been suggested in older threads.

I really like the idea of using Constitution to reduce next turn's AP instead of skipping the turn. I think some CCs should also have an effect on cooldowns instead of just AP.

I think the reason why people go crazy over the RNG when it comes to CC is because of turns getting skipped. If I do 40 dmg instead of 55, or if I crit or don't crit, that's OK, at least my turn isn't getting skipped. I think that's where most of the frustration comes from.

That being said, I still think DOS2 system is better than DOS:EE. In the latter it's just way too easy to dump CC AOE and stunluck the whole enemy team in turn 1.