Still can't tell if a building is buffed. This must be tied to the 'still can't tell if a buildings production is stopped'.
Still no fix for the buff effect not showing up. This is only annoying, but does make you have to click on each workshop to see if it is buffed or not. Really don't know why this has happened and not been fixed as it has always worked (if my memory is correct) since I started playing in 2011.