Goblin King got a huge buff with just a couple really good goblins in his summon pool. His last trait is the thing that needs to be looked at. The existence of the queen has for some reason shifted goblins to the highest life race in the game in most situations already. The 20 life is almost laughable in terms of magnitude, with Grapplepot handing out 5 to the team every 5 match and Behemoth getting 8 per match 4. I suggested devour immunity before, but given that he can now reach ridiculous life via Grapplepot even without his own legendary trait, I no longer think this would be a good idea. Scale his life buff to magic (or even half magic), first of all. He needs a new trait, but I have no idea what to give him. Another match 4 goblin buff trait?
Thematically, a guaranteed extra turn would fit for Goblin King, but balance wise, putting fire-and-forget extra turns on mass board mod spells is a bad idea. Removing an entire color very rarely leaves a board with no match 4s or 5s for one side or the other, and this is another instance where you take a board event that can be used that would leave you in an either strong or weak position, rarely neutral, and make it always leave you in a strong position. And yes, freeze exists, but there is really only one viable freezing troop, which does so on a random troop, for a random length of time, and often off random board events. And considering that freeze counters all spell chains that don’t include a cleanse and not just the braindead ones, do we really want an environment where freeze is commonplace just because we need to counter a handful of out-of-control troops?