I got the game, my quick review is: The solo campain is 50/50, there is little strategy, but, I love the level-up stuff in between missions. There's so much diversity and possibilites when you level up your squads. But the solo campain is more like a FPS and RPG combined.
The scirmishes are where it's at, but NO base building; zero; nada. But it only comes with 7 maps total and NO 2v2 maps, only 1v1 or 3v3
You start with one "base", and units are built/reinforced there. It's micro intensive, and since they totally ripped the game speed adjustments out of the game (game speed adjustment was in the first game, and something that made the game playable for my other friends, who now won't go near DoW2) you'll really have to be able to click fast. You can pay to upgrade your one base up to two times, allowing more powerful sets of units. All units you produce can be upgraded too, with a variety of weapons/armor/equipment.
There is a Squad cap (just like the ship cap in Sins), so you won't be spamming units, and since units level up, keeping your units alive is an importnat strategy (you can loose all but one guy from your squad, and still "reinforce" them to full again, keeping all your upgrades and level-up abilites). You will REALLY get attached to your small army, and feel the loss when one dies.
As for the GFWL, it's awful, and the game SAYS you can play via lan, but, since I can't install it on my other two computers here (due to steam) I say that was almost an outright lie on the games behalf. I would not have purchesed DowII had I know about Steams "big brother"ish restrictions.