Ok, so I haven't been around the last 3 weeks (my interests jump around a bit) and as such I haven't played with the new drop downs, but I did use Honchkrow somewhat extensively on my teams (and a few different versions) so hopefully my statements still hold some value.
I like Honchkrow, he fits well into my play style. I think he can hold his own on a good portion of teams and he can (somewhat) viably run a few different sets (good for surprise factor - which I also like).
He's not broken.
Use him. You will see what I mean.
He wreaks shit when you're low on the ladder, but he's simply slightly above average when you get anywhere close to the top.
The best way to see all the weaknesses a 'mon has is to use it a lot; by personal experience he has quite a few. He has hard counters/checks, pretty good counters/checks, and things I'm surprised can counter or check him. When I play vs "insert arbitrary good 'mon here" for the first few times, I'm often wondering what could ever beat it. I then use "inserted good 'mon" and usually realize its really not as good as it first seemed.
(I would list Honch's counters, but it seems that has been hashed out pretty well over the last couple pages)
Maybe this was already said, but just a couple of my additional thoughts.
Moxie (there are even a few different moxie sets) generally the best, best chance to mid or late game sweep, can be played around, and has the most counters, checks. (Flying/Dark ain't godly coverage)
All his other sets choice scarf, mix, (choice band even?) they can beat some specific counters and can certainly be good in their own right, but he can't sweep the same way moxie can, and things moxie has a chance of beating won't be beat.
I never said Honchkrow has no checks, but checks aren't going to stop Honchkrow from coming in and killing something and eventually even sweeping the last couple. It's ridiculous to suggest someone has to carry Regirock, a fast sweeper with Substitute and perfect prediction skills, oh and Entei and Hitmonlee and Lugia (may as well) to merely fend off Honchkrow reliably.
I actually don't think that it's ridiculous to carry one of the checks you listed (and failed to list as there are more) as most are very competitive in the RU environment and reliably stop other things as well as Honchkrow.
Aaand, I realize it was just for effect, but if you really (may as well) think you have to dip into Ubers for a Honch counter... well, you just don't
It seems the general consensus among the tier's top players is that Honchkrow is good, but not broken. It can be assumed that there will be disagreements, but thankfully the (Council) majority will rule