I was of the same opinion, but it makes a lot of sense when you think about it. Pogba is gone, think we all know that, but next season we'd be left with only Bruno as creativity in midfield. 1 injury and we're back to not having any creativity and starting trash like Pereira. Grealish in and we have basically 5 players for a midfield 3. 1 of either Matic or McTominay to provide the physical, defensive force, while 2 of Bruno, Grealish and Fred rotate, keep fresh, fill in for form or injuries, change games off the bench, etc. Even all play together as Bruno can play further forward and Grealish can play on the left, in case of injuries, or just those 3 being the midfield 3 in the easier games we don't need Matic or McTominay. Don't think it's too much or crowded or anything, it's the sort of level of quality in the group that we should aim to have everywhere. Competition for places in some spots, adequate cover for injuries in other spots, but a well rounded side. Without getting Grealish (or someone like that), we'll just be back to overly relying on the starting 11 to not get injured.