simple, make the game about free roaming. make every building a building, instead of walls like they are right now. We should be able to walk into lifeinvader at any point. If we shoot up the place it should be closed for however long you think it would be closed in real life. (a week 2 weeks?)
make way way more stores to rob and more ways to rob stores. There is a safe in the back of the store, but you can't open it with a sticky bomb....Let people free roam bank robberies! Lots of stuff like that, it seems like the game could be all about that stuff but it isn't so I'm not sure if this is even worth mentioning. I hope it becomes like that though, because I've always seen GTA as an open world game and would like it to have more things that actually have to do with the open world gameplay instead of funneling it down into missions and "jobs".