I agree
Yes the science bug... Also the corporation mode bug... And the asset bug... those three are about what I'm hoping for...
I hope they get rid of the annoying "Governor Idle" bug when you move a governor even though it's more of annoyance than a game changer. Along with fixing the corporation mode bug (AI not improving resources I assume you mean) I hope they tweak the tourism boost again so it at least requires industry/corporation for the tourism multipliers. My ideal would be something like you have to make a corporation and then each product based on your monopoly increases your tourism multiplier or something like that. I'm fine with a boost but I'd like to have to work for it.
I agree there will be almost zero AI 'improvements' in this. The AI programmer has almost certainly moved on to Civ 7. The majority of the AI work is just making the AI recognize and play with the rules of the game. Making it attempt to play well comes later...