Havent played it on the PS4 yet, but the vita controls are fine. I do wish I could aim with the right stick while walking, but that's a minor complaint.
I noticed minor hiccups and slightly long load times on the Vita - but those might be vita-specific judging from the vids I saw of the PS4 version.
Played it for an hour on the vita today - but I have a feeling I'll enjoy it even more on the PS4 with a bigger screen. The game's art direction is outstanding.