I'm sure this has come up before, but especially in the GE the matchmaking needs looked at.
If I require a certain condition for a certain commendation I naturally search within that criteria, I'd like to be matched appropriately.
By the same token, if joining a match mid-way is going to negate a commendation, then I'd rather wait. An option to specify this would be appreciated.
Lastly, when I'm placed in an unsuitable match and leave, I'd prefer to not be placed right back in it when I search again. Frustrating for me and doubtless the people that keep seeing me popping in and out.