migs imo is one of the best shot stoppers in the league, those 2 saves against everton were world class.
he definitely needs to improve his command of the area though. I think that has to do with the defence as well though. its clear that the keeper and defence aren't on the same page. thy either don't get along, or don't train as a unit. the keeper and the defence need to be one unit and have confidence in each other. hopefully klopp can sort this out. migs has potential I think but would still like to see some reinforcement.
im always sceptical of taking keepers from lower clubs (was sceptical of mignolet) they have a lot more shots to show off too. any keeper in the premier league should be able to look good with a lot of chances. look at begovic, everyone thought he was a world beater and he has looked like puss at Chelsea.
its a two way street, your defence by limiting shot attempts makes a keeper look good and your keeper by making one or two key saves a game make the defence look good.