Well I know it doesn't mean that much these days but in Sterling's last season as a reserve he had a phenomenal game as a right wing back. His energy, discipline, stamina and positivity were really extraordinary to behold. So although many things have changed since then, I think he's certainly got it in him to dazzle in the odd game in that role, and he's certainly got it in him to do a hell of a lot better in his other roles. He looks mentally jaded at the moment.
Sturridge also can play way better as a lone striker. Look at some recordings of when he did so last season - so much more energy, imagination, strength, fight and incisiveness. He's not always been this indolent. This is him with a problem and maybe he needs extra sessions with Steve Peters but he's come back from injury really in the wrong frame of mind.
So I don't think we should treat the current concerns as beyond resolution. These players are much better than they seem at present.