Proposal: add Noisy to default software

No. Best if it is developed independently.
(Too much to add to the existing lists: Kicksecure · GitHub / Whonix · GitHub)

And also best if discussed with the Tor community generally as well as with the anonymity research community to get wide feedback to make sure this is actually working.

Lots of things has been said about traffic analysis. Did you look into it?

Some here:

https://www.freehaven.net/anonbib/

Problem is when using Multiple Whonix-Workstation that this would multiply the cover traffic. Hence, better if run on Whonix-Gateway?

Resolved by running on Whonix-Gateway?