I thought it would be cool if there were a big like 50-100vs50-100 BG for all highest ranking gladiators at the end of season to compete against eachother for legendary pvp items and weapons, could include bosses in field that yield score
Also thought of a dungeon system, you could add random more buffs, mob hp, damage, mobs, extra bosses with extra adds, to create more challenge and could eventually drop special legendaries with low chance and boosted items and more items with higher stats, could even make 5 man dungeons into raids with more ppl and extra boss ablities on bosses
There could also spawn random bosses in the world that has an announcement that drops special stuff and all instances and zones could be upped to max lvl content with boosted loot when you reach max lvl. Something to work on.
Also could check other games instances and remake graphically and number-wise em to fit wow and add em to world?
Maybe random core instance, in molten core, extra spawn points and randomly add monsters there that are tuned for max lvl