Brand: not sure how bad Conflaguration is hit, as it's range is pretty important for setting up the skillshot stun. Pillar damage nerf is tiny.
Kassadin: I'm loving all of these buffs pretty much, especially his Q missile speed. I was hoping for mana cost reductions on his Q though.
Mordekaiser: pretty hefty nerfs, need to build more AP to compensate for the shield changes.
Nidalee: CD reduction is nice, defenses kind of meh.
Shen: Hell yeah no-cost ultimate, a very necessary change. Now Shen doesn't have to sacrifice valuable energy to help an ally. Everything else seems ok, will have to test out the changes myself.
Singed: lol Singed buffs.
Taric: Heal range increase is awesome, Shatter buffs even more so, especially now the aura doesn't have to be sacrificed. Damage decrease is a bit eyebrow-raising but the reduced cooldown is great. Dazzle changes are nice overall, I always disliked the variable stun duration, don't care much for the damage. Radiance remake seems great now that Taric has another damage ability but I don't like the bonus reductions very much and the extremely increased cooldown. Kind of miss the self-healing aspect.
My overall opinion of this patch: a very good set of changes, but Mordekaiser players may feel the biggest adverse changes.