so...this is just my return opinion, and is probably not worth a whole lot yet since I'm still missing a few, but I feel scutt, wyrm, and pyris should probably all be dropped by 1.
scutt for the same reasons as you mentioned for karak and mabek. He does 1 thing very well, but...
wyrm is awesome and I love him, so take the rest of this with that in mind. No doubt he has one of the most interesting mechanics with his evolution and can come in clutch to fill a void in the roster. That said, he's just a little too much of a lesser jack of all trades. If his active wasn't as good I'd honestly feel that he should maybe even be down at the bottom.
pyris is...well...just a worse version of tiz. Honestly, tiz just needs some tlc on his active and he'll be a or better. Pyris is good aoe, for sure, but unless your running a minimal number on your team, tiz can do pretty much the same thing passively that pyris does altogether, and if you find an active changing item tiz is set. Thus, I agree tiz is b at situational, but pyris just doesn't quite add up...for me.