I’ve played with it a little and found the new report designer to still be a preview version with some strange behavior. BIDS seems stable and the report project environment is nice, too bad the wizard isn’t there (yet i hope). The new reporting services configuration manager had a new skin and some new things like report manager url and scaleout options tabs. All in all they look like getting there.
The thing i miss most is to open a shared datasource of a Report model in the new Report designer.