Just remember what you have now vs. what you want. Right now, you can resupply a gv anywhere. This will not only rearm your gv, but also repair it. (I still don't see how supplies un-flips a tank.) Also, stealing dropped supplies works both ways. They can get yours, you can get theirs.
What if adding a rearm pad did away with supplies? Or, what if your rearm pad could be used by your enemy? Or, what if your enemy, who you can't keep far enough away to keep from getting your supplies, camped your rearm pad?
Dropping supplies gives another reason to use jeeps, M-3s, LVT-2s and SdKfz's. It also takes a bit of planning and forethought rather than just spawning your gv and going at it.
Nothing wrong with this wish. I just see a lot of wishes like this as being "awwww, it's just too hard to bother with" wishes. You have the means to accomplish your goals available now, you just do not want to take the trouble to use them.
wrongway