We're not talking about punching out a logo on a day's notice. It really can't be that difficult for a design studio to make a logo in the span of a couple of weeks to months. And heck, even if it is too fast of a time table, for some reason, then that's an argument for a pair of temp jerseys, which they're already doing, but not against picking a definitive name. They could be the Yeti or the Blizzard or whatever and just have a wordmark like the Rangers as a single year thing, and nobody would blink an eye.
But a name is one of the hardest things to ever change too. You'll see teams adopt new jerseys every once in awhile, maybe along with new colours of new logos - but changing the name entirely? That hardly ever happens outside of relocations.
The New Orleans Pelicans are literally the only example I can think of right now - and even that is tied up with relocation drama (with the name Hornets being first from Charlotte, and then picked up again by Charlotte once New Orleans dropped it).
Wait, I wasn't thinking of offensive names that teams were almost forced to change. Bullets to Wizards, Redskins to Commanders, Indians to Guardians, Eskimos to Elks, Colt 45s to Astros. But those are a whole different category.
But anyways - goes to show why you really want to get your name right.
There's also all kinds of legal implications. Can you get a trademark on the name? What about internet domains? Do you have to negotiate with trademark holders with similar sounding names in unrelated areas (if Yetis - do you need to negotiate with the Yeti drinkware people?).
We saw this with Vegas - even having lots of time to decide on a name they still ran into litigation with the Army Golden Knights Parachute team.
I'm kind of partial to the name Outlaws personally. But if you search "Outlaws" at the USPTO trademark search system you get 4000+ hits. If you search Outlaws Hockey you find inactive trademarks for the San Angelo Outlaws and Colorado Outlaws, both former hockey teams.
If you go for something generic like "Utah HC" - you can definitely get the trademark, but it'll be very weak because anyone can use the name "Utah" for anything they'd like - you just can't add the letters "HC".
So there's lots to consider, because the name is the one thing you want to make sure you get right.