There has been quite a lot of changes. In a juvenile way the change I'm most glad to see is that it will no longer be necessary to uninstall before upgrading! Huzzah!
There is a lot of new functionality, which I'm looking forward to exploring when I get back to work. The vHealth tab looks like it could be useful. And there've been a number of small amendments to some of the other tabs too.
RVTools was already very impressive, but it is now even more so.