The most important issue for me would be the user friendliness. I don't have time to really test this version but in previous versions I noticed that some things didn't really work from the first time.
You should really focus on the way objects get edited. Object should get selected from the first right click and should be changed when the property window loses focus.
Further: I think I've mentioned this before but it would be an interesting feature. Users should be able to view worlds without rights. So the world admins can grant rights but the individual users should be able to toggle the rights on and off. (Object select, bold text, flying, pass-thru, ...)