I'd argue at the moment he's our best player at the moment, wasn't at his best at the start of the season (understandable given settling defence in front of him) but he's been superb recently and is probably one of/the best in the league, and I'd say Championship quality. Only 28, easily got another 5 years in him, hopefully he stays and after that we've got two promising keepers to choose from.
(Still under contract until summer 2019)
Think one thing for sure is Eastwood Won't Leave until summer at least. When your playing every game your bound to be happy. He won't leave for a team in this window unless they are championship and can guarantee he will be first choice.