I had a great idea on how to utilise the PS4's touchpad, you should be able to swipe it to use the in game phone like you would in real life. Ok so you obviously wouldn't be able to select things because you couldn't see the options but just to be able to scroll through texts/emails/the web would be pretty cool imo.
I also hope they update the roster of vehicles available to purchase on the web in SP. Yes the game is called Grand Theft Auto but I like to play the game with the mindset of the character I'm playing as. For example, I don't think Franklin would steal a car purely to keep as his own but instead would want to buy one legitimately and the same with Michael. Trevor on the other hand I have no qualms with stealing a car with lol. Sure Franklin used to repo cars but that was his job. I'd like to at least see the same amount of vehicles to buy as GTAO or even better, all the cars in the game because I've always thought it was silly that you couldn't buy any car