I am seeing similar issues. I downloaded a trial version of 11.52 so that I could get started while waiting for a link to software and licenses to arrive and the issues I have are:
1. VUGen slow to start up
2. Unable to select View Script from Controller
3. Occassional hangs in VUGen
With issues 2 and 3 I am seeing VUGen taking about 25% CPU and around 220 MB memory usage.
Also I find it strange that ~12 seconds to start up and ~6 seconds to start recording is deemed acceptable. I would expect much quicker response times than that in this day and age.