Currently I'm finishing the release notes. There where a lot of changes.
You are right with Package.tt and SharePointTargets.targets: We removed the text templating from the VS 2010 format to be conform to the Microsoft.
We also updated the SharePointTargets.targets. But I found that in recipe "Migrate Solution to Current SPSF Version" there is a problem to identify the type of the project, if the solution is selected. I need to provide a fix for that.