Oh, I doubt one group in a thousand would even consider using the loop, much less allow it. I don't think anyone on any side saw it as a practical thing. But we do so love to send RAW...
Not much, I wouldn't think. About the same amount of individual spotlight as anyone else gets. One session where the Warlock has to deal with his patron, one session where the Cleric deals with church politics, one where the Fighter finds the men who killed his master... It all need to even out.