Awesome post.
Just to confirm: I've also played several bughouse simultaneous exhibitions 
. They did not go well 
.
Edit: On FICS, (I started playing crazyhouse in January so I wouldn't know), I think you can chat privately to your partner. Maybe someone could confirm this? Anyway, the real life equivalent would be whispering or getting crafty with foreign languages / neologisms or something. (And before anyone objects to the neologism idea: you can just choose ten words for a knight, ten for a queen, etc., to keep your opponents guessing.) So, that's my reason for chatting privately to my partners.
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With the introduction of Bughouse on Chess.com, first it has to gain an audience. (Thanks for the club to start the process!)
I've also learned to play KoH and Crazyhouse. (Thanks for these options, too. They are extremely helpful learning tools and games.)
On the other hand, trying to start these games, sometimes you have to wait (for an audience or other players). That's okay. Minor irritation. Takes time. (Be understanding.)
However, a little while ago, I was playing one Bughouse game, and, another started. The tabs to the right to show simultaneous games-in-progress is helpful. BUT, it seems that if you're actively searching and waiting... when a game starts, other searches are generally cancelled.
Or are other searches cancelled? I was actively playing one bughouse game, and another started. (My screen switched / flipped to a blank board with other players.)
If I try to start searches manually, it doesn't appear that I can create two searches for the same game on the same time-control simultaneously.
I've been trying to figure out how to use the "Rematch" button with Bughouse... sometimes you get a re-match, sometimes other players sit-down. Best guess: Those actively paired stay together, versus purely "random" searches.
Sometimes I hit "Rematch" and "New X-minute Round" buttons -- and both appear searching (right tab) when I close the room if it takes more than a few seconds for a re-match.
I've noticed that if I close the room, sometimes starting a new Bughouse search from scratch works right away. (Probably others doing the same instead of hitting "Rematch." Same players, sometimes re-arranged.)
It would be nice / helpful for Chess.com to detail the matching logic used for Bughouse games. We could contribute / help with this process.
Also, where's the Private chat? Or, do we have to go into our primary settings and allow anyone to message us to create a private Bughouse chat with someone who is not in our friends list?
I object to "private chat" -- because OTB, Bughouse players can hear each other. But, I don't object too much -- I understand technology and progress. It just doesn't seem as fun if you're getting pounded and beat by two friends who collaborate and coordinate matches, other people disable chat by default (I disabled this setting for Bughouse fun), and people who prohibit messages from people who aren't friend's can't have a private chat (such as an NM, CM or IM asking me the other day). But, IRL... you have two boards the same-size next to each other, and you can hear the other team's communications, see their prompts, etc...
Secondary to everything above, sometimes I go to another part of the Chess.com website, make moves in Daily Chess, then click on "Live Chess" and the last live game I played is presented, and I have to close that tab again... WHY? (Especially if it's already been closed -- the same as if a "rematch" or another live game starts, when you click the "X" to close a tab, that tab should remain closed... this leads me to believe there are "matching" issues as it pertains to what live chess thinks a player is doing, or where a player is at in the UI, versus where they actually are or expect to be.)
So, in summary: Exit Live Chess, or click the "X" on a live game (completed)... live chess probably shouldn't be taking you back to the last game played if you've closed it out. And, if you can't create two manual searches for the same game on the same time-control... there's no reason a Simul should appear, or other open seeks should be closed... barring the traditional... manual game going, and tournament games start (what I'm familiar with from the Classic Chess.com interface.)
Minor Aside: When you click the "X" on either the other board, or the move list for a Bughouse game -- it should have the exact same effect... it should close the game. (Period. End of story. (Live, last game) Should not reappear when hitting refresh or coming back to Live from other portions of the Chess.com website if someone clicked the X -- this should update the local JavaScript cache to the same effect as a new game starting. We should be able to get back to our games for review from our list of games we've played against other players in respective places in either Live or Chess.com sections of the website.)
I've noticed a few other minor issues. But above is most often what's on my mind. I don't understand what the deal is with matching and rooms and pairs and games, etc... and it would be helpful if some UI and/or Logic issues were clarified for the community.
Otherwise, the other obvious factor is rating range (and settings) for not just one, but the different Chess variants, alongside other settings, etc... Right now it appears that if you constrain settings for one, you constrain them for all. (And this is not a good introduction to a variant. Settings should be per-variant, not global, else it takes that much more time to setup a new "custom" match... and with new games, waiting for a growing audience to catch-on... slows progress.)
That said, I'm ultimately extremely grateful and appreciative of the ability to play Bughouse online. Thanks for this!