Well I just downloaded the new Web Demo Revision and it seems that they colour coded the 3 Religions, Shinto is Green, Taoism is Blue and Buddhism is Red. Also Reimu and Ichirin's theme's have been reverted back to the versions that were used in the original Demo. that's all I can see so far.
As for the AI, so far I've noticed that the AI doesn't seem to guard as much and is a bit more aggressive than before, at least that's what it felt like at any rate.
Another thing I noticed is in between your SP Bar and icon it now shows either a Shinto (神), Taoism (道) or Buddhism (仏) icon to represent what kind of deck your using and it now says MAX when your popularity reaches 100% and -100%.
also ahve a handy dandy screenshot of Marisa doing Sungrazer :V
Also don't ask about the text for Sungrazer, I think it might be because I haven't set my PC's Locale to Japan yet since I reformatted.