Well having a match mode is a good idea if you ever want to get anywhere with MP. Just that it's a joke right now and only 1v1s seem to work nicely.

Add to the list
1) don't know if it's been patched yet, but all 2v2's and up are small unit sizes - that's so totally epic eh?
2) after you play a few MM you'll have to close STW2 down and exit it out using the task manager still running in the background exe. because it hang searching for players
3) people claim to see a fund cheat, but I haven't seen it yet in my 100 1v1 MM games
4) if someone CTD while loading a game you won't know and the 3min countdown will go to 0, so it's like did he crash or is he really still loading?
5) you can duplicate vets
6) can't really use broken vets in 2v2 and up - I was able to a few times, but seem to only work in 1v1s
7) taking away honor upgrades and not replacing it with something to allow you to spend every drop of funds without tweaking your army forever or swapping so many units around just to make sure you spend all your koku is a joke. I suggested many times to just allow the buy of one partial unit, but that idea was rejected, so when someone barks at me for taking awhile to pick my army they can kiss my butt because I don't like to have 325 or less koku left unspent - that's the cost of like 6 basic skill upgrades. That's a reason why I like 1v1 MM.. I just prebuild my armies and take the time to make sure the unit icons are in the place I like them on my UI before I start a match for grouping. I like to to have my army tweaked and my unit icons in place before I go into spasms during a match.

On the note of when a 2v2 ends up putting it a 3v1 sometimes you can just click on the open spot next you and your teammate automatically jumps over to your side