It's worth a go.
I've absolutely no idea how the ratings work, especially with keepers. Couple of seasons ago the top player in my league was the bottom teams goalie and he'd conceded 170 goals. And my keeper rarely gets above a 7 (mostly 6's or 5's) even when he's made saves and not conceded any.
The game's far too unpredictable to make any sort of judgement on what would work, just get a new guy, sell one of your other keepers and cross your fingers!![]()