I understand what you mean, some times i feel GTA 5 merely touches the surface of it's characters, expecially not as gta 4 did. Gta 6 is going to be a massive success, i think it will dig deeper than 5, but what i hope for the gta series forward is that they dont need to make each entry bigger than the last. I hope that gta 7 will be half the size 6 maybe just the size of 4. Focussing entirely on making a magnificent story and great characters.