Will it?
Bigger average crowds than Rovers. More money (
wage bill about £5m a year, which is way more than anything here). A better league. No Europe, but the FA Cup always offers the chance of a big game (like Arsenal in the quarters a few years back - and they'd beaten Ipswich, Burnley and Brighton to get that far). He mayn't be going for the title, but I don't think that makes it a step down. And I'm sure he'll be thinking if he does a good job as a young manager, then he could have clubs from a higher league interested.
It's hard to see it as anything other than a perfectly logical career step to be honest. Maybe it won't work, and English football management is a notoriously basket-case career option, but he's earned the right to give it a go.