Of course, Knack is a sub-mediocre game and putting it on ps+ would just kill any chance of success for K2 which looks like a massive improvement upon the first game.
Sony is not stupid, I mean, not THIS stupid. Knack on psplus just doesn't make sense, i know it's a meme but sometimes I feel like people have actually been expecting for it to come to ps+
I think this covers all the bases quite well, Two "AAA" titles with one of which feeling very much like an indie one. It's a shame the quality is so low, but that speaks to nothing of their origin or status.