If anyone wants to know what I'm like during a beta when I'm just a beta tester here's some of my posts during the Supreme Commander beta (as Draginol).
http://www.forumplanet.com/SupremeCommander/topic.asp?fid=22613&tid=1967042
http://www.forumplanet.com/SupremeCommander/topic.asp?fid=22613&tid=1969144
http://www.forumplanet.com/SupremeCommander/topic.asp?fid=22613&tid=1969816
Now in those posts I'm not super specific since it was still relatively early in the beta process.
I think in many cases, GPG benefits in Demigod because there aren't so many sycophants in the beta like there were back when Supreme Commander was being made. Demigod has benefited from the critiques it gets.
One other helpful thing is that Supreme Commander critics (myself and Mike Marr at GPG) are involved in the design on Demigod. The main limiting factor we have is budget and time for v1.0 and v1.01.