Major post time, and since I'm probably not going to be able to get to reqs (got papers and exams over past/next few weeks, didn't have the time), so this doesn't really bear much water in terms of a vote. But I did get around to having ~60 battles (and ~2300 coil), so I've seen a reasonable bit of the ladder. I've gone from completely pro-ban to kind of moderately pro-ban.
Laddering Thoughts:
Suspect ladder OU isn' all that different from regular OU. Sure fairys are on the rise, but why wouldn't you use them they're great pokemon and you now don't give a free switch-in to Metagross with defensive fairys. I'm still using the same sort of teams I used before, I still need to prepare for most of the same threats, and really the only difference is that I've got one less sweeper/wallbreaker to account for. Fairys are more of a threat than they were before, but maybe its because I use Jirachi on most teams I build, they don't really terrify me as much at Metagross did. (The old fairys are pretty much the same, Diancie has average defenses for an offensive pokemon at best so it can barely switch in on neutral hits, and Altaria isn't very hard to force out). I don't really know if banning Mega-gross will be the best move at "fixing" the OU metagame (you could argue we haven't had enough time to really deal with MegaGross as the domineering threat), but to be fair the suspect meta has been on for a few weeks now so its not really an accurate representation of a "settled" metagross-less metagame either. So I don't know, ladder was really meh to me.
More on Metgross:
I'm still leaning ban in spite of the ladder experience part because Metagross is pretty much on a completely different level than a lot of OU offensive threats. A lot of the bulkier options have speed issues (Azumarill and Heracross) or aren't very powerful without setup (Clefable and Sableye), and the really offensive options either need significant team support or are frail enough that all it takes is a powerful neutral hit or an uninvested SE one to put them into danger zone (Talonflame and M-Gallade). Pretty much, they almost all have notable flaws that can hinder their ability to do their jobs. Metagross has almost none of these problems, its resistant to Stealth Rock, has excellent bulk for an offensive pokemon, and hits extremely hard right off the bat. All of these points have been argued over and over again over the past 30 pages (also I went into more detail in
this post 2 pages back), but I will only hit the bulk one because its what breaks Metagross for me. When a fully offensive pokemon (ie: zero bulk investment) can avoid an OHKO from a super effective, invested, STAB Earthquake from Lando-T
(regardless of how much HP Metagross has left that's a super effective, STAB, base-100 move coming off of invested base-145 attack and that doesn't guarantee an OHKO) that just hits too bulky for me. Granted, this is a completely arbitrary definition of "too bulky", and you could find another calc to dispute this point, but the fact remains that it can avoid an OHKO from scarf lando-t on a SE move which is really impressive. None of Metagross's individual positive traits are necessarily 'broken', but I think that the combination of bulk, immediate power, and speed is a bit too much if you're comparing it to the rest of OU.
I will not deny that Metagross has its flaws/downsides. It would love recovery to prevent it from being worn down doing its job, and it would appreciate another moveslot to be able to deal with a lot of its checks and (dare I say) counters. It also doesn't really have much variation in its sets, so you have a pretty good idea of what to expect (STABS and a combination of GK, Ice Punch, Hammer Arm/EQ), meaning it relies on team support to get past the more defensive answers to it if it opts for one coverage move over the other (Offensive answers will crumble after a few hits on the switch). I can understand how these make Metagross more manageable, and in turn why people do not believe it deserves to go.
so,
TL;DR suspect ladder was mostly meh in terms of 'being better without metagross', I still think Metagross should go because its got excellent bulk for an offensive pokemon, hits really hard uninvested/unchoiced and has useful coverage (I elaborated more on this in
this post, second and third paragraphs), and has great speed to add to this. Metagross may immediately be 'broken' when looking at it alone, but comparing all of its traits to the other dominant OU pokemon, it blows pretty much everything out of the water with the combination of bulk, speed, and power that these other threats lack. It does have its share of flaws however, so I can see why people don't find it unhealthy/broken/banworthy.
edit: ironed out some wordy parts