Alright, I guess the weirdest thing to me is that UU is the meta game that decided to look into scald first, because, of all the meta games I've played, it is the easiest to fit a dedicated response to scald on any given team (maybe barring Suicune, but I'll get into that latter). There are a huge number of Pokemon in the UU meta game that absolutely don't care about switching into scald, and some number that even punish the scald user for using it too liberally. Meta relevant threats that fall into this category include Heracross (guts), Machamp (guts), Vaporeon (water absorb), Toxicroak (water absorb), Shaymin (grass-type, natural cure), Roserade (grass-type, natural cure), and Reuniclus (magic guard). That list includes things that benefit from or don't care about scald burns, and doesn't even account for Special attacking water resists (such as Hydreigon or Rotom-C) that while they don't appreciate the residual burn damage, they appreciate the chance to switch in and fire off nukes. Given the fact that there is such a diverse selection of Pokemon fitting on every play style from Stall to Hyper Offense (and that doesn't even include clerics that can fit on the bulkier playstyles), it is pretty clear, at least imo, that scald is not broken in UU. The only thing that gets kind of shaky when switching into scald is if the user is Suicune. But this is due to the fact that it is capable of running moves like Ice Beam and Extrasensory to deal with potential Scald switch ins. Other Bulky Waters don't really have this option given their low offensive pressure, so the only Pokemon that really makes Scald more difficult to account for in team building is Suicune (I don't think Suicune is broken, I just think its better than other bulky waters, lol).
So that leaves the option of Scald being uncompetitive if it were going to be suspected / banned. I really don't agree with this either (although this is a little more subjective to be fair). Comparing Scald to moves previously banned for being uncompetitive, that leaves OHKO moves and the more recently banned Swagger, Scald doesn't really fit into this category (imo). Swagger, for example, was a move that had a 50% chance of giving the abuser a free turn, and given it was commonly used by Prankster Pokemon with Foul Play also had priority, and also doubled as a Swords Dance for their damaging attack. I don't think Swagger and Scald are comparable due to the fact that Swagger is pretty clearly much more uncompetitive then Scald (higher rate of negative effect and the other effects). So that leaves Scald vs. OHKO moves, which I also think aren't truly all that comparable. While its true that both moves have a 30% chance for the negative side affect to kick in, there is a huge difference between a Pokemon being burned and a Pokemon being dead. Aside from the fact that the only counter play to OHKO moves are Sturdy users, a much more limited, and a much less diverse group then the group mentioned in the first paragraph, there is also the fact that a dead Pokemon is much more serious than a burned one (burn doesn't even cripple half of the mons, they can run lum berry, etc.). At the end of the day Scald is just one of those moves that has a 30% chance to status a Pokemon, with a key difference of hitting the switch in super effectively (unlike Lava Plume), I don't really see this as uncompetitive so much as just a really strong move that Pokemon should be using if access to it (like Knock Off, Stealth Rock, Baton Pass in some cases, etc.).
I think that the ladder is definitely going to be interesting, and I have no problem with UU looking to explore a meta game without scald, just as last generation there was an OU ladder with no Stealth Rock. I really hope UU decides not to suspect / ban Scald at the end of the day, but I may try my hand at the ladder to see what the meta game looks like w/o scald. :o