It's a no brainer, that. However, if someone is sat there with a cheque for £15m+ for Mitrovic, and we're on course for promotion having played him for 5 minutes, perhaps there is sense in it?
Mitro is, sadly, a terrible finisher. I love the thought of Mitrovic, but the reality of him falls well short. He's not a £15m striker. Solomon Rondon, for example, went to West Brom for £12m and looks a far better player all round.
I think we'll see Callum Wilson or similar in, but not til Mitrovic is gone. I'd personally rather sell Perez, but either way we have a lot of sub-standard players. Mitro's one of 'em.