Yeah, I stayed far away from this after having purchased D3: Renaissance. It had beautiful unit designs, that oil painting type effect for the graphics engine that was nice...but terribly slooooooow gameplay. Missions took forever to play through, and were comprised of killing the same units dozens of times over and over again. Also had the campaign missions...and then one skirmish map at release, and then wasn't supported AT ALL after that. As much as I LOVED d2, I kinda figured that I'm done with the series as D3:Ren was sooooo bad.
It's funny you should mention a painting because as beautiful as the graphics were the gameplay in D3: Renaissance was like watching paint dry, dull and monotonous. I love Disciples 2 also, that and how good the screenshots looked conned me into buying it last year.
I know one person who has bought Resurrection and he said it was pretty much more of the same, but this time you play the undead campaign(only)and then one skirmish map.