Isn't this basically contrary to what other people have already said about the PS4 version? Early impressions, videos, even review tidbits have basically been positive.
The hate this franchise gets is unreal. I don't even like most of the entries, but once Unity was fixed (I agree, that should've never been an issue to begin with), it was pretty good. One of the better ones.
That said, Black Flag, Unity, and Syndicate all seem like they would've been thematically excellent period games if they didn't have to lug the AC label around with them.