I'm not sure if this is caused by the engine or other updates, but here's what I have experienced:
1. I use factory selection hotkeys in Hotkeys/Selection/Factory Selection. Now, they were broken, probably due to using the same hotkeys for control groups even though it has always worked with that conflict before the update. After I removed the control group hotkeys, my factory selection hotkeys worked again. The rebinding took unusually long, multiple seconds for each key rebind.
2. My unit icon draw distance has been reset to 250. I couldn't change it back through the menu because I couldn't find the option in the menu anymore. I expected it in Settings/Interface/Hovering Icons. Has it disappeared? I changed UnitIconDist in springsettings.cfg manually. It would still be good if I could find that slider for a WYSIWYG tuning.
3. The metal spot metal rate text on the map looks fat and dark
and seems to be unaffected by settings changes or maps.
4. The following things now cause noticeable slowdowns: Com death, change of spectated squads, hotkey change, game end.