Reina ended up leaving the club because he told Rodgers that if an offer came in from Barca, he was off. That left Rodgers with a dilemma on whether to bring in a new number 1 in anticipation of Reina leaving or a new sub keeper in case he stayed. Rodgers did what I think was the best thing and tried (albeit unsuccessfully) to get in a new number 1. We couldn't have gone into the season with our Doni and Jones as our keepers. He brought in Mignolet who had done really well at Sunderland but it obviously hasn't worked out.
Alisson is the type of goalkeeper signing that we've been craving for years. He's quick off his line, makes the routine saves look easy, makes the tough saves when needed, is good in one on one situations, has great distribution and is a massive calming influence on our back line.
I'd like to see him stop messing around with the ball at the back. Since that goal that Leicester scored against us, he's taken fewer risks but my heart is still in my mouth sometimes although that may be down to years of Mignolet/James experiences