Keep in mind Spellstiched can only be applied to undead, so you would need the Stiched-flesh familiar feat. That's already 2 feats gone (Improved Familiar and Stitched-Flesh Familiar). I'd reccommend dropping the spell-stiched idea unless you have some very good spells to put in.
Most of the nonlethal removal spells are enchantment or necromancy, most likely two of your three banned schools. Enchantment and Illusion you have partially covered via Beguiler. I hope you didn't ban Conjuration too or that would take Evard's Black Tentacles out (a pretty effective battlefield control spell at these levels).
If you didn't ban necromancy, then perhaps the Mother Cyst feat will be worthwhile. Make sure you have a way of implanting a Necrotic Cyst ahead of time as that makes protecting against the other spells in the line much more difficult to resist. For that matter, it makes alot of Necromancy spells more difficult to resist.
Minor Shapechange is only useful if you have Polymorph (or a higher level Polymorph subschool spell) prepared, but it gives multiple benefits you can activate without breaking stride (you won't get much milage out of Quicken Spell at this point). This one is up for debate as to how good it is, but I think it's the most useful of the reserve feats.
