I like the concept of your changes, but i think I would go a more simplistic route and modify as few moves as possible to achieve similar balance.
First, i'll assume the -1 ex rune change is implemented and we would balance around it. As many have mentioned, this nerfs summoner the least of the 3, and doesnt solve the blender issue. For me, the fix would be-
-Quan not able to send bat while jumping
-Summoning bat cant be done mid trance
This lowers overall combo damage, nerfs meter gain, and prevents the trickier timing of most hard blocks. It pretty much changes his combos to sorcerer combos, always trying to end in 141 xx bat and concentrating on zoning.
To compensate for rune in Sor/War, i would just heavily cut the startup of ex skull and add a couple of blockstun frames. Essentially, this makes quan choose in each mixup midscreen to either not have a gap and be plus with skull, but cant combo to trance, or, combo to trance with rune but have a low-starter gap and a -1 on block.
These changes keep his mixup and runetrap in the corner (nerfing runetrap damage a little as well) and make quan choose a sensible mixup option midscreen but keep him dangerous if he corners the opponent.
I would still like some of your string changes, such as making 21 F3 be a useful tool in warlock, and keep your purple spell change and maybe have it drain a little stamina as well.
