Honestly, I'm feeling very calm about the whole situation.
I'd love nothing more for him to stay and keep banging out goals, and I don't think that we should just throw in the towel so easily. The reality is though that, as a club, we just can't support him in achieving what he could be elsewhere.
If he leaves, I hope we get a shit ton of money and use it to try and overhaul the squad in a long-term, meaningful way. Hopefully it would be to a club outside of the PL obviously. He would get my thanks and support as I don't think that he owes us anything at this point. If anyone of us were in his situation, 99% of us would probably do the same thing. We've been hurt before by players leaving but came back stronger in the end.
If he stays, hopefully we have a new coach that can do something with this squad, and we make a few really good moves that improves us as a team.
My guess is that he's still here next year due to financial reasons, but we'll see.