This forum is far too full of sensible reason.
Some seem to think that the only way to improve and get experience is by playing in the premiership.... and by that, they'd be happy with 10 minutes off the bench in the first instance.
I suspect, however, that a player is more likely to come up against more varied opposition in the championship, because typically, those in the premiership will usually play the numbers and the correct percentage game.
60 minutes + in any league is better for experience and improvement than 10-15 minutes in the premiership