First off, the only two game modes I really care about are Free Roam and Race, and I hope both are in GTA V. Here's a list of things I think should be changed and believe me it would be for the better.
-Better multiplayer user interface. I know they were trying to go with a 'no menu system' but I don't think having to access the multiplayer through the phone isn't very good. And individual multiplayer lobbies should be cleaned up a bit.
-No more of this group kicking system, the host of the game should have all the power. The fact that the host can be kicked from his own game is just ridiculous.
-When someone is talking, their name should pop up on screen (like every other multiplayer game) so we can see who is talking. It's pretty damn annoying when someone is blasting music into the mic and you have no idea who it is and you have to go into your phone, mute everyone one at a time to see who it is.
-Create some sort of credit system (or any system for that matter) that if you quit a game, you lose a credit. If you lose a certain amount of credits, you are not allowed to play online for a certain amount of time. You get credits back for playing each game all the way through.
-Better security. The fact that there are so many modders online is just unacceptable.
-Survival mode. Players start in the city with cpu pedestrians. A zombie outbreak then happens at a random spot in the city, the zombies attack you and cpu pedestrians. Cpu pedestrians turn into zombies when attacked. Survive as long as you can.
-Ability to take a car you customized in singleplayer (if that feature is available(which it should be since it was in San Andreas and it was fun)) and bring it into an online race.
-If you turn around and drive in the wrong direction, a timer should pop up counting down from 10 and if you do not turn around you are automatically teleported to your last checkpoint facing the correct direction.
-Lag. Fix it. If someone is lagging, it should effect them , not me. If someone who's lagging is driving next to me, and they even touch my car, my car freaks out and either spins out or flips.
Cops n' Crooks:
-I don't know how exactly yet, but this game mode can be so much better.
-Now, in theory, this game mode is fun. In actuality, not so much. This game type needs some work.
I don't see why there are not real advertisements in the game. Now when I say advertisements, don't mean the out of place advertisements. Like if im in the middle of playing the game and all of the sudden an ad for pepsi pops up on the screen or something, no that's not what I mean that would just be retarded. I mean like real advertisements in appropriate places. Like a Taco Bell fast food place instead of Cluckin' Bell, or a Sprite billboard on the highway instead of a Sprunk one. Wouldn't companies pay Rockstar money so that they can be featured in the game? Does it not advertise their product by being in a very popular game? And imagine if every product in the game was a product in real life, imagine how much money rockstar would make. This could then even make the retail price of the game come down to $40 or even less. Along with advertisements, they should use real vehicles (Corvette instead of Coquette). This goes a long with the advertisement thing.