I've found this great BlurMate plugin today for TM2.
https://github.com/cliffrowley/blurmate
It works great, I just wonder since it's just a few lines of code, why background blurring is not included in TM2 already?
I always loved the blur in Terminal and thought that TM2 is not capable of it. Found the plugin just by accident.
Some way to set the blur using "defaults" for example would be nice.