Grimmer right midfield? Why?
Because he's a natural right sided player. OK, he's defensive but wasn't afraid to get forward last year. He'd help out Sterling behind him in terms of covering as well.
What other options?
Bayliss? Not a natural wide player and when we've shoved him out there he looks a shadow of the player he can be (and he underperformed this year anyway). I can't see him doing the tracking back and his propensity to dribble and lose the ball aren't going to help matters without someone able to cover him like he gets in the centre.
Allassani? Preferable to Bayliss but I'm not sure he's totally comfortable as a wide player or his ability to track yet?
Hickman? Possibly - he can play anywhere on the right but his lack of experience (especially with someone almost as inexperienced as himself behind him) might be a potential weakness.
As I said Grimmer could go RB with Sterling in front, but I'd rather not mess with the defence if possible, especially when Sterling has started to look so capable there. I'm not saying Grimmer RM what I'd like but we have very few options and I think it's the one I don't like the least.