Well. In OU Current, I saw all variations of teams. Weatherless offense, balance, stall. Rain offense, balance, stall. Sand offense, balance, stall. SUN-- you get the idea. BUT! Every team had a Genesect. Well, not every team, but the majority did. I personally don't have a problem with Genesect, but it's an undeniable fact that Rock Polish variants required me to play very differently (revenge killing MoxieMence with Scarf Keldeo's HP Ice is a no-no) and quite dangerously (ex: Thunder Waving a +1 SAtk Genesect with Ferrothorn. If it had gone for Flamethrower, I would have died. If it had gone for Rock Polish, I would have lost). Even though every team had a Genesect, though, they were all different. That's what made the difference.
In OU Suspect, probably every 2 to 3 teams was a rain offense team. And almost every single one of them had a Scarf Keldeo, lol. So many games were decided by speed ties with those ponies. And then Tornadus-T, Breloom, Thundurus-T, Ferrothorn, Jirachi, Tentacruel, etc etc etc. There just wasn't much variation in the Pokemon (even the sets!). I have to admit I was using typical rain offense in the beginning, but I got bored as shit. Like Lavos said, every game was Rain Offense vs Rain Offense. That's why I used Trick Room--so I wouldn't be bored as fudhkfhdjsdfuck. I'm not sure if the removal of Genesect caused this or just the fact that "better" players laddered on OU Suspect for the time being, but I can say I did not like it. The metagame was probably healthier with Genesect (at least with what I saw). I literally only saw 3 people with Sun teams (I believe Pocket, Dr. Dracc, and Pleasure), a few people with sand teams (lol Doom STOP WHIRLWINDING MY SLOWKING), and some weatherless. The rest was rain. Okay I'm done writing something nobody's going to read.