So I have done some more searching around and it turns out quite a few people would be VERY interested in a campaign mode for this game. Here's the deal, basically think diablo instead of 6 champions you have as many champions as they have currently in league. So you basically get to run around killing a bunch of stuff and questing meanwhile the whole time you're testing a bunch of combos you wouldn't mind trying in multiplayer, and seeing how far what goes. So it becomes a win win, in campaign you get to see how far you can push your champ with combos and different styles of gearing, and in pvp you're testing out stuff you already locked down in campaign as viable and working. Just some food for thought.