This way, everybody can play and gets what they want! If your best champ is a 3*, then play the 3* node. If your best is an 11 cover 4*, then play that node. If you want to try out your half-covered 5*, then play that node. MMR will still work the same. Of course, you rotate the characters every PVP and since the devs like to have themes, then pick 3 characters for a theme.