I have to admit I skipped a few preview builds, but this one introduces some features that have me instantly interested again.
Time scaling is now available in Construct 2, with the ability to set the scale individually for objects instead of only globally. Pretty sweet!
Another important addition is the Custom Movement behavior, which should open up a whole lot of new possibilities. Also a few other minor behaviors have their debut, like the "Destroy outside layout" or the "Wrap" behavior.
Head over to the official thread for the complete changelog and download the release. Have fun!