Just now updating my studio rig to 2017.2 from 2016.09
My experience right now is the VST Scan is hanging on VST3 dll's.
I renamed all that failed and re-scanned them one at a time; everybody is happy now!
I did NOT get the "dreaded"
Audio/Midi setup screen (I am updating from 2016.09).
Theme reverted to Tungsten, I reloaded my preferred theme; annoying but all good now.
If I run into any "issues" out in the studio I'll let you know.
T