Ok this is obviously very late but hear me out, I've been rather busy.
I had a discussion with hogg about the results of the suspect, and his opinions kind of surprised me. He said that even though Klefki has an incredible typing that allows it to soft check virtually all of hyper and bulky offenses biggest problem mons while also easing the late game with spikes and stopping threats with prankster thunder wave, it remained balanced and healthy in his eyes. The biggest area of concern for me is that all of Klefki's merits combined leads to it being an incredibly splashable mon for offensive teams.
The biggest argument that I had seen for Klefki being healthy was that it's poor matchup against the majority of the tiers hazard removers meant that it tended to do its job poorly. As far as I'm concerned however, this problem doesn't really apply to Klefki when you consider it's usefulness on a team. Klefki is coming in on pokemon that have traditionally been massive problems for offensive playstyles, like Scarf Hydreigon, Sceptile, Crobat, and Beedrill and using their inability to beat it in order to support its team. In this sort of situation the Klefki user is winning in two ways. He is both preventing these fast attackers from running through the rest of his team, and he is incapacitating a switchin with thunder wave or supporting the rest of his team with spikes. Klefki is doing something beneficial for it's team every single time it comes in, regardless of the tentacruel, empoleon, or forretress switchin.
This is the reason that Klefki is incredibly overbearing for the tier in my opinion. You're taking a mon that is already splashable by virtue of it's typing, and you are giving it the ability to maintain momentum by doing something to support the team almost every single turn. Klefki just has too many things going for it and not enough to actually inhibit it's success to be healthy for the tier.
I loved ORAS UU. It's been such a fun experience especially with friends to share it with. However, looking back at the ride doesn't change the fact that this train has been pretty much run into the ground by stuff like Klefki. I don't think it's an uncommon opinion that ORAS has become much less fun to play given this awkward power balance we have going on. I'm not saying this is anyone's fault, especially not our TL's and council. They're all smart people who in my opinion have made mostly good decisions as a group. If anything, this situation was a product of the pokemon in it. In generation 7 it is entirely likely that we will be faced with a similar situation to ORAS. So my question to you all is how to deal with it. I don't know, and almost certainly no one really knows how we could have stopped this unhealthy power balance other than just "ban 'em all", which obviously could have just resulted in a worse situation. A better metagame next gen is only gonna come around if we talk about this more as a community and figure out the objective state of the metagame and get to the root of the problem.