Grealish does at 1st glance look like an un-needed / luxury signing but looking how we've played for the last couple of games it seems that a lack of a striker is no longer a issue for us. I would actually go as far as saying that dropping a player like Kane into our current system wouldn't result in any more goals (maybe even less).
I'm really liking our tactics at the moment - we've gone from getting the ball out wide and crossing it in to a "target" man like Kun or Jesus and we've gone back to the "good old days" (in my mind) of short, neat passes to unlock defences - like we did when Merlin was here in his prime... :)
Our current setup relies on quick short passing, and I'm not sure Kane (or any other of the names being mentioned like Haaland etc) would fit somehow?