Possible issues, some of which have been reported before. None are showstoppers, although all will probably generate forum complaints and problem tickets ;)
1. Need an option to startup in 2D mode. FIXED
2. If you select a smaller size "fixed scale" for the aircraft model in preferences, then the 2D icon of an aircraft should also reduce in size so that it is a similar size to a 3D model.
3. When I switch back to the 2D map, the map is zoomed out a lot further than it was before I went into the 3D map. The 2D map should retain all it's settings even if you switch to the 3D map and then back.
4. Is Radarbox meant to remember what external KMZs you've selected? I just restarted Radarbox, and it's forgotten that I selected the UK airspace KMZ.
5. I can't find the "Use Only 3D Aircraft Models (if available)" tickbox anymore. Has this been removed?