3) Power launchers leave the attacker very open on recovery. It would look weird to have a launcher with so much guard break on block; that's what power blows are for. PLs work in the same vein as other launchers (risky when whiffed of blocked), but you need a really big opening for a really big launch.
6) This would lead to no throw punishment, not to mention throws being useless in this game. Throws are a big risk in this game, and doing them at the wrong time leads to taking huge damage anyway. Landing a throw should be a big deal, even on normal hit. Throw punishment is a form of guaranteed damage; that has to stay because every throw serves a purpose, even frame advantage ones.
I agree with the rest in your post, especially #8 for characters who have no defensive options at range or upclose. These would not be gripes tho, but more suggestions for additions. Do we have a suggestions thread anywhere? If TN nerfs based on complaints, then they should also look for stuff to add based on community suggestions.
I remember a looong time ago, Mr. Wah made a suggestion to have differing lifebar amounts for each character, which 2D fighters often have. These lifebars can be based on weight, speed, build, etc., and can reinforce/influence a character's playstyle. Maybe even have different characters more/less resistant to stun or stun thresholds?