Thanks for the explanation Keyvias. I can understand the logic of it, but I still think it's running into a crucial consideration: it feels like the game is forcing a compromise to make up for its own mechanical shortcomings in matchmaking.
I really don't mean to be rude, but the last time I went on with my clan, we had about 7 games in a row where we were returned to the crew form after each one, because we were a 3-4ship crew, the match making system was dropping us in (presumably the only available) noob lobbies, where we completely wiped the floor each time and they all left. I just stopped, because it was no fun and probably scaring off new players, and all my requests to swap ship slot were being ignored, so I couldn't manually put myself on the losing side to get more of a challenge.
The trouble with that is that when you go to crew formation manually and invite from your friends list, it will put you all on the same team, and probably won't find a balanced team for you to fight against, because it won't shuffle up the ships from your crew form to even the teams. If you DON'T go to crew formation manually, chances are you're in a crew witha few noobs, who will leave and keep interrupting the search for a new match, or won't realise the crew is theirs and won't click play, so everyone else has to leave and start again.
Since then I've got into a bunch of really good lobbies. Ususally after a couple of games, peoples' friends join via the community pane and we'd swap ship slots where necessary to keep the match balanced. Then you get one really sweet match that makes you remember why you still play the game, and suddenly you're dumped back into the crew formation at the end of it, and have to start the whole process over again.
I'm sure matchmaking will get better, but at the moment, (whether or not it works well at peak play times) it feels like it's not working well, and this 3-match countdown just stops us from manually making good matches, and drops us out of good lobbies when no one wanted to leave.