Great. We're just planning our migration. The project properties "Provider Manifest Token Value" of LLBL we thought we'd have to change to make it know to work with SQL 2014. Right now the text "2008" is there.
the manifest token is for EF runtime, I believe it throws when specifying 2014, though 2012 works nowadays (was throwing in EF 6.0.0) so that's the only thing you have to change