First, let me say this is a relatively minor complaint I have with the game. I love X-Wing but I've always had a nagging problem with MOV. When I started playing, I didn't really pay much attention to tie-breakers but when I started winning, tie-breakers became an important consideration to me.
One, I've never agreed with awarding half points on large base ships if you get half way through the ship. Large base ships typically have very low agility and go down faster than a small base ship with an equal number of points put into it that's built to tank shots. I think large base ships are needlessly penalized. If you don't destroy the ship, why are you getting any points for it?
Two, I think MOV is the worst way to break ties. It doesn't indicate how well you played, only how many ships you blew up, which large based ships are prejudiced against for no good reason. You can play some of the easiest opponents in the room, wipe them out 100-0, and get rewarded for having easy matchups while someone else has the hardest matchups, still wins but wins by fewer points because he was playing better opponents. He's penalized for having to play better players even though he still wins.
Three, they don't even use MOV to pair players during Swiss, probably because they realize it's a useless indicator of anything. If you're going to use MOV, at least be consistent and use it to pair players in Swiss rounds.
I think you should only get what you destroy and tie-breakers should only be based on your (and your opponent's) strength of schedule. Thoughts?