Jaws of Mork is a competitive suballiance that improves the squig lists and makes better the mixed armies, but the mixed armies are two steps below the average lists of other armies.
The problem with Jaws of Mork is the same you have with the old squigalanche armies, you have very poor matchups that you can't afford, so it is an army for a 4-1 in the best of the tournaments.
Although, squigs continue to have very favourable matchups so Jaws of Mork is a very good list in team tournaments.
Another point, are the grot lists, they are the more balanced options we have to go to a solo tournament, but we haven't got any good matchups so all the games are very hard to win.