Remove the auto attack function from FF XIII or make it so you actually take direct control of the characters instead of just being like, I think you should be a dps for the moment, but hey just a suggestion guys, its not like I'm the one playing right? Also I would make it so that the scenery wasn't so annoyingly linear, sometimes I get turned around when running for five minutes then find my self where I was then run in a straight line for another 10 minutes and finally get somewhere because apparently I've been walking up and down the same 4000 foot corridor over and over.
World of warcraft, I would make it so there was more spells and abilties that were just fun little perks that didn't really effect combat, such as the hunters ability to take direct control of their pet or the mages ability to teleport,
Rift I would make it so the riftstalker gets to target where they blink just like the high elf can target where they jump
Pokemon, I would make it so they stop making new ones without making ANY sort of advancements.
Final fantasy 7, I would cut out the first section of the game, or at least the puzzle solving aspect, it doesn't really work with those graphics.
Oblivion I would add dual wielding.
Dokapon kingdom, I would remove the darkling, or at least made it so you actually had to have been picked on to get it, like have someone fuck with you ten or more times and be in last place for five weeks or something.
Morrowind, I would make it so the map wasn't so incredibly terrible.