ashen saffron
Please consider merging the build menu and the buy menu. Left click initiates a build with hammers, right click simply buys. No need to jump back and forth, or accidently queue up builds when you were trying to buy multiple buildings at once.
It would make the whole system so much easier to use. Especially since this iteration of Civ has made buying things such a core feature.
woven chasm
Or just a button like the [Target] button in independant powers menu but it would say [Buy: XXX O]
nocturne spoke
This would be nice. I've often ended up queueing something for building when I actually wanted to purchase it.
patent schooner
Instead of the right/left click, the cost amount can be to the left of the turns to produce as a smaller button which will buy upon clicking. They can set it as a different button press on controller.