What do people think of the new command cards in the expansions? There are a lot of them that are really interesting, even just in the "preview" for the Rebel Saboteurs. I think an underrated aspect of Hide in Plain Sight will be to block line of sight to more important models while your opponent can't attack the blocking character until the next round. And Collect Intel can help you avoid any unwanted surprises. And there are plenty of other good cards in the other sets.
But I think my favorite, at least among the ones that aren't limited to a specific model, is Lock On. You can play it after rolling the dice to get enough accuracy to hit, cancel the target's dodge result, or get a surge through. It's only for heavy weapons, but those are the figures you really want to score hits with, anyway.
Cripple and Hold Ground can make Royal Guards (and Gaarkhan, but you can only field one of him) really good at locking enemy units in place. Reinforcements, Strength in Numbers, Grenadier, and Endless Reserves make a General Weiss Stormtrooper squad an intriguing possibility. And Slippery Target can make an already fast Rebel squad ridiculously mobile.
I can't wait until Thursday, when I'll be able to get my hands on the stuff for myself.