The driving sequences should say. I quite liked how in IV, each sequence told a bit of back story between the characters, but if you failed the mission and restarted, you would get an alternative voiceover where you would learn something else. It also kinda ruins the flow of the game if your friends constantly drive you places and you get a black screen as you warp to the new area. There are very few points in GTA where you don't start one sequence where you finished another, be it cutscene or gameplay, and I think it's important to keep it that way.
What I don't like is when driving sequences are made unnecessarily long e.g. meeting someone in a random building in Bohan, only to have to drive to Alderney straight after the cutscene finishes. It would be better if you were told more about the mission when you get the first phone call, so you can meet them in the relevant place instead.