Twitch stream was really good last night - the campaign looks really fun - and quite challenging on hard. Tactics and co-ordination are absolutely required on any difficulty above normal (well, to be fair, even normal requires a fair bit).
I even had 2 of my questions asked:
1. Additional toolbars? - You bet, toolbars for everyone
2. Item stash? Currently not in, but if enough people pipe-up about it on the forums, there will be (which has incidentally already began).