Been trying some 5 vs. 5 ranked matches and it's been remarkably pleasant: My team mates have mostly been competent (regardless of skill) and communicative, with a few even providing valuable leadership. A lot of the matches were pretty close (I just came out of one 16-13 on Mirage) and the others are one-sided but never a total blowout. I feel satisfied even when I'm on the losing team.
The small teams also make things a lot more mobile and active. Areas of the map will be actually empty, so you can try to flank the other team without always being killed by one of the 2-4 guys who just camp corners until the end of the round. I mean it's always a possibility
, especially if you come in through the obvious way, but not an inevitability.
I just wish my latency wasn't so inexplicably terrible on servers I'm sent through in matchmaking. I've set max ping acceptable to 50 (the lowest possible), yet my in-match usually hovers around 70-90 with lag even worse than that usually indicates. And casual matchmaking is even worse: my ping will be 300+ with utterly unplayable amounts of lag.