How does your adjustment to alter self/polymorph affect the Wild Shape class feature?

You have not weakened the divination or illusion schools (two of the most unfair ones) in any significant way, other than reducing the number of self-targeted illusions a caster may safely have active at any time.

Personally, I think that casters should lack "no-buttons", and instead have the spells that would need to be "no'd" nerfed as a result. So, invisibility would need to be nerfed, but see invisibility and true seeing would be removed. Illusions should allow a saving throw to disbelieve to anyone who views them, even without interacting with them.

Do your changes to Summoning affect an outsider's ability to call allies? Because those seem more restrictive, and therefore, I really couldn't see a pit fiend attempting to call a bone devil and ending up with a celestial dire ape or something. Besides, they already have a chance to simply fail.

You also need to fix conjuration (calling) abilities, such as gate and lesser planar ally. Dunno how, but those are really unfair. Maybe say that the creature you call charges you extra gp for each spell-like ability or other resource you ask it to expend for you?