Profile of cmcjas

I've just tested the game today, I would like to report a few things base on my personal experience:
Good: 1)better path finding (especially on retreat)
2)tactical map finally, clearer UI portrait.
3)blizzard is less foggy
4)doctrine units no longer replace default units
5)better performance on summer/spring maps

Questions: 1)where's my tiger tank?
2)standard AI is noticeable easier compare to closed beta, more challenge?
3)mortar seems a bit weak/not very accurate, in closed beta they are OP,
maybe nerf their powerful a bit, but less OP than closed beta?
4)bring back tank traps from vcoh? get rid of annoying mine field for German?

Bad: overall performance is worse compare to closed beta despite getting better fps on summer/spring maps. as many people have already mentioned that when playing winter maps fps drops significantly during blizzard. in addition, I get huge stutter while scrolling around the map and some random fps dip when there are deep snow. I'm playing on max, lower the settings to medium/high reduce stuttering but still does not fix blizzard and late game lags.

note: I know my pc is very modest kind of low end (amd fx 6cores, gtx 650 ti)but that's not my point. because I can play other big games like grid 2,nfsmw,bf3,crysis 3,metro last light on ultra (except crysis 3 and last light on high) with playable/good fps, yet I'm getting so much lags with coh2 shows that essence 3.0 needs to be much more optimised prior to the final release.gameplay wise,the game is looking good though