I agree it's a bit of a conundrum. And along with his age why I think we should at least be open to the idea of selling him in the summer if a big offer comes in. Not actively looking to sell him, but if someone wants to put a proper offer on the table... At some point his pace will start diminishing too.
That being said, I think he can work in this system. As a striker with better wide players and on the left if how he and Udogie combine is tweaked. Will probably still be a bit of a compromise, but he's a good enough player that it could still be really good.
The balance and quality of the front three needs to be sorted out over the summer somehow. I think there are a lot of potential solutions for that, but all include some players in and some out.
He's matched Salah's goals and assists this season ..
The front line balance is off, no question, but that isn't on Son ..