Mid campers are garbage pvpers anyway. If its OP mode just buy 6 sets of leather and they're toast. Getting punch bows is 25 diamonds now, so if you really can't get to mid quick enough before opponents get 25 dias for a bow, you really should uninstall minecraft or something because that's pretty bad. That video of the recent eggwars update where you midcamped was full of spamclickers anyway, and the people who you mentioned "were good at pvp" didn't buy extra sets or anything, so they were total noobs too.
If you don't like gapple prices and want them to be higher, there is a game called Speed Eggwars where they're 5 gold in OP or 10 gold in normal