I say yes because not everybody is going to like the story of 1 character so it's good to have other options who are different from one another. I'd actually like to see 4 this time around with a female being one of them.
If anything Rockstar could make it so playing as one of the characters only is an option if the player isn't interested in switching back and forth between the other characters.
Funny,no one complained since the birth of GTA about the protagonist thing until V came out,it feels messy and you don't really get attached to any one of them,unlike previous GTA's,you can actually have that link with the protagonist,hope that changes with VI.
You mean you don't I had no trouble taking a liking to the characters I took a liking too (not Trevor). So again I say it should be optional for players like you to make the story mode focus on one character if that's the way you want to play the game.
This way you can go back and play the story all over again later as the others and experience their path.