It's one thing to shoot the flag stand before you grab. letting loose 2 disks that both land on the flag while skiing toward the thing at a million miles per hour is completely different. Unless you can land the 2 disks or have someone clear the stand for you, you will pretty much lose all of your momentum when you have to slow down to finish clearing the stand.
But, of course, I like that the mines take a couple of hits. It will promote team play. You've gotta do something to promote team play now that vehicles are painfully slow and you can't get in a vehicle with the flag. I know if I put a mine on the flag that gets blown up consistantly, I'd start to get pretty annoyed. I wouldn't mind if I could carry 3 mines and replenish them everywhere, but that is no longer the case.