Syria is willing to let Russia keep it's military bases there if they fork over Assad

Sending Assad back sends a message to Russian puppets/allies that Russia will not hesitate to sell them once they stop being useful

I'm sure Lukashenko is keeping an eye on what happens for one

Being on team Russia means you're with an extremely weak ally that can't be guaranteed to do much to help you at a time of need. Russia however gives you a guarantee that if you, cutthroat dictator, end up in trouble personally, they'll give you a nice comfy mansion somewhere in Moscow to live your days afterwards.

They need doctors, especially in times of war.

Literally none, he's a dead man walking

lol what are the pros of keeping Assad

Other Russia-reliant strongmen care deeply. Russia's relationship with them hinges on Assad, to them he's a bellwether for their prospects if anything were to go wrong with their regime.