It'd be nice if the quest progress didn't decrease. It doesn't feel enjoyable to place many hours into the game, advance, and then be reset to 0%. I also feel that SBMM would offer a fairer playing ground for newer players.
Before you think I'm quick to complain, here's a quest that I'm not complaining about: Ace of Spades. Yes, it is taking me a long time to get precision kills, but at least I'm making progress. I'm more than half-way there. It's the progress resetting that is the issue.
EDIT: Finished it in Rumble within a couple of hours. Thanks for the tips.