I don't mind the unchained Summoner's spell list a lot. I feel like they could have kept a few of the early access spells like SM:9, but that's a minor quibble. My main issue is the loss of customizability in the Eidolon. It felt like the complete opposite of "unchaining" something.
For a nice reference, I actually wrote up all the changes from the Summoner spell list. It can be found HERE