Wow! you're good! you can actually hear it has a lightweight flywheel
Seriously though, it may well have but that is not all it takes to have a free revving motor, the cams will help but the stand alone
engine management has the biggest influence on how it will behave, and it also has the std RPM limit raised.
Hearing your remap holds the RPMs on closed throttle is not good, can't think of one reason why, are you sure you haven't got a problem with your throttle calibration?
+1 on the end part of that, sounds like it's a TSI Golf behaviour!