Where did this idea that Mence should be Uber suddenly come out of? Lati was never a counter for Mence, only a check, and we still have enough decent checks for Mence. Lati being banned doesn't really change too much.
Anyway, here are some arguments I've seen presented for Mence to uber:
1. "It's unpredictable" - This is a BS argument. Being unpredictable doesn't make something uber, sorry. Anything from Lucario to Honchkrow to Sudowoodo can be unpredictable. Nor do you need to sac a poke to find out its set honestly. Seems people can't predict anymore. The ability to predict and deal with things separates people like KG from scrub99778 at 100 CRE on the ladder. Most good players don't care about lesser ladder players, they are the ones keeping Ninjask, Vire, etc OU.
2. "MixMence shreds stall!" - This is one of the more stupid arguments I have seen, a well built stall team doesn't lose to Mence, ever. Again if you can't deal with Salamence, maybe you're just bad?
3. "Salamence can kill anything with prediction!"- So can Gallade, Magmortar, Dragonite etc lol.
4. "Magnezone makes Salamence's job sweeping easier and removes Scizor as a check!"- Not Mences fault, make Magnezone suspect under the "support characteristic" then.
5. "Bulky Mence is too strong!" -Yeah because something that loses to anything with Def EVs is totally too strong! It also loses to previous counters in bulky waters lol.
6. "Checking and revenge killing is not viable," -Sure, because forcing it to switch and take 25% when it comes back in is not viable? As for checking, yes this is VERY viable, making the Mence user think "darn, I have to predict correctly to gain kills or I'm gonna have to switch and take 25% again!" and be fair though if you can predict well you DESERVE to get kills. No Pokemon guarantees kills through.
7. "SR is moot, Mence has Roost and Rapid Spin support!" -Cool so the Rotoms suddenly make spinning sooo easy ? [/sarcasm] ._. As for Roost that's kinda like arguing Toxic Spikes is stopped by Natural Cure, yeah sure the problem goes away but its still always there and it cuts the effectiveness drastically of things like Blissey, Bliss has to keep healing and switching which gives you free switch ins. If Mence Roosts you get a free switch in and then has to keep healing each time it comes in to avoid getting wasted by SR.
8. "No counterz bawwww," -Welcome to D/P/PT/HG/SS, the metagame where a lot of pokemon have no counters! Honestly if this was valid Dragonite and Lucario would be uber lol. No really they would.
I honestly think Pokemon is becoming whinymon. Aka ban all the stuff that hits slightly hard and the slippery slope argument is coming into full effect.
No matter how much you look at it, SR is THE most common move in the game. Tyranitar is Salamence's 2nd most common team mate (aka with SS, SR and LO recoil Salamence loses 41% of its HEALTH IN 1 TURN) and if you play around it with your preferred playstyle you really shouldn't lose. I.e. HO sacrifices Pokemon to stop others setting up, not just mence. Stall as said either has scarfers, multiple steels or bulky as heck pokes for Mence to get past which it shouldn't do if you play intelligently with them and use your brain. This is viable and you can't say otherwise or we wouldn't have stall teams at the top of the ladder. Lastly, doesn't bulky offense has a crap load of priority most of the time and Scizor? A Pokemon who can switch in on 3/4 of its moves at least on all sets and after SR and one turn of LO recoil kills it with Bullet Punch. Not to mention BO teams have an a[/i]ss load of steels and stuff like Swampert and other bulky waters etc, that's more than enough to deal with it if you don't suck. Not to mention scarfers and revenge killers. Since you know that's kinda what they're for, if your actual counter/check goes down they let you deal with things.