Custom games should be more custom

Custom games aren`t custom enough, you can only chose what map to play and how many people can play. THAT SUCKS! Gamemodes like U.R.F should not be special. You should be able to control the jg spawn timers, the time/amount/type of minions that spawn, mana costs and starting gold in a custom game. And the special game mods that Riot releases should be more like Ascension and not just small variations on the regular maps. Tell me what you guys think.