In my case, version 10 has a new interface, but it has several issues.
1. It doesn't handle multi screens (if you choose 1 monitor, the other monitor goes black and is not useable. Typically you have a web browser on the other with instructions on what to do, you google around on the one to try and solve the problem, whilst applying the suggestions to the remote desktop session.
2. It poorly handles the system going to sleep. It never wakes up.
3. It poorly handles logging out, it just hangs
4. If you download an RDP file and double click on it, it doesn't give you the option to save it - it just disappears never held in the nice interface that someone has designed.
I don't see anything better from version 8 at present.