the V3 App is interesting.. its an upgrade in that it allows integration with forums and such, but its deficient in the same manner. The V3 app, for example, does not inform me of notifications of forums I'm actively participating / posting in.
I never expected the V2 chess.com classic app to do anything with forums, so I can't say its better or worse. Its different... better & worse. :)
I just noticed that v3 on my iPhone doesn't allow me to make comments in news or vote chess discussions. It tells me that I need to enter a comment when I hit "done".