There's no reason why it shouldn't. He's a major upgrade on Eriksen in basically every department besides long passing from deep areas, both on and off the ball. Many in this thread keep talking about how he's best used in advance positions - don't really think this is true at all, he's always been best as an 8 and when Potter tried to use him as a winger for god-knows what reason he struggled.
I still would probably argue that from our midfield, Kovacic would be the better fit in a starting XI but you probably could do with some HG players, Mount brings something different to the table that you don't really have in terms of ball-carrying, and he's generally much more tactically flexible in his versatility.
I don't think Mount is good enough to be the best player in any team (and if he is, that team probably isn't going particularly far), but he's undoubtedly a valuable player who contributes to winning consistently.
He's had some sort of bothersome hip injury that has limited him for basically the entire second half of the year. Not expected to be a long-term thing going forward though.