Innards out totally has its use, but I dunno. Seeing this thing treated as just death fodder kind of seems like wasted potential.I agree that Unaware is the premier ability on this thing, but I feel you undervalue Innards Out a lot, especially in sets that don't have a consistent way to capitalize on Unaware due to Pyuku's extremely passive nature.
Dual Screens, Z-Memento, and to a lesser extent, Pain Split (I say "lesser" because it's a gimmick more than anything) are all sets that appreciate the extra utility Innards Out provides them as extra mileage you can get out of sacking Pyuku when it no longer serves its function.
tl;dr: I agree, but Innards Out is surprisingly neat as an option to have.
PS: Why are ppl not playing Baton Pass on this thing? It is literally its best move, yet none of the Pyukus among your replays seemed to have it (unless I missed it.)
http://replay.pokemonshowdown.com/gen7ou-501468669
http://replay.pokemonshowdown.com/gen7ou-501448819
Actually, this thing is hilariously threatening when you add in mindgames. Anything that sets up gets slammed by Unaware, and the 'mons that slam it hard normally like Koko get OHKO by a full-hp Innards Out variant. Kind of an ultimate guessing game.
Toxic murders this thing, but other status aren't bad at all; burns are a joke, the only thing paralysis does is give a chance of being haxed to death (lol 5 speed) and regular poison is just annoying chip damage that makes you forced to recover more.
I haven't seen a memorably good match that really, really shines with Baton Pass; a lot of the time it tries to curse up and gets killed.