Alright, so looks like there's a lot for me to comment on!
I'll start with Zero. Honestly, I can't help but have mad respect for somebody who puts as many hours in the game as he does, and because of that can whoop everybody's tail in the US, and in reality, he only really needs a top tier character when fighting another top tier player. And he may seem cocky, but so was Ken, and you know what they have in common? They were the single dominant player in their respective games. I think Zero's tired of the U.S.'s lazy, whiny mentality on Smash 4. In Japan, a Peach player ranked 19th in Japan was able to crush his falcon, yet in the U.S. he can bust it out anywhere there isn't Dabuz, Nairo, or FOW and still dominate. That makes me ashamed of U.S. players, and I hope whatever Japanese players come to EVO destroy us so we can get a wake up call. He's not really a villain like Leffen is for Melee, but more like a King who knows he's on top, and not everybody likes their King I guess.
As for tiers in general, this game's way too young to even have an unchanging top tier group, without even considering patches. I agree with Zero's underrated characters video; I think all those characters have top tier potential(except for maybe Little Mac). We just need players who can bring out the absolute best in each character, and I have no doubt that our current idea of the tier list will change dramatically.
I love Villager's customs! They make him so much better. Nobody can bother you on the ledge, you have dominating stage control, and pushy's pretty good for combos. Default villager is pretty fun too, not gonna lie. Standard timber is always a joy to use, but imo extreme balloons outshine default too much to justify using default. I actually just love customs in general. Diddy's 1123 set is the explosive barrels and battering peel, and with those moves you can perform a combo that kills at like 70%! It's crazy! And honestly I think this craziness is what will set Smash 4 apart from the rest of the series in the long run. That's why I hope customs don't die after EVO.