Couple of impressions
-Volus seem to have cool powers. One of their (adept) abilities can be used as a set of biotic grenades that float around and you throw at will, yet if you keep them at your side you can get up to a 60% power recharge bonus.
-Volus melee is kinda...a portable tactical cloak basically, not what I expected. Still: the heavy melee, Halo-like protective bubble with transparent hexagons is absolutely rad.
All in all I would say they did a good job: it's a tricky character with lots of unique features. Can't wait to unlock the engi and see what recon mines are all about.
-Still ain't got my way around the turian infiltrator. The havok soldier though...his havock strike looks cool but it's a charge without the shield restoration. Yes, he gets those operative packs but it's not like I can use one everytime I spearhead an enemy spawn. Also the melee evolution on havok strike doesn't combo with cryo blast, so basically this is a soldier with a debuffer and an attack that only gets you good damage against health. Havok strike doesn't seem to work like a melee and doesn't get any buff from melee upgrade. Still, movement wise this character is pure awesomeness: teleportation? noooooo: jetpack, dude. Jetpack! ^_^
-The tweaks to the maps are spot on. White has turned into something completely different. Good job Bioware.
-Challenges are...it's good they are present, but I would have much appreciated if they would have been a matter of ability rather than just piling up points. Bioshock 2 multi (not that I'm comparing the two of them, it's just that I never played multi aside of Gears and Bio2) had all this roundabout ways to use powers and weapons to complete the challenges attached to them. Then again, they can always add more challenges ^___^
-Playing in the new maps with hazards is a blast (...literally). I will stick to those as much as I can. They added a lot of little graphical touches that enhance the mood of the maps: like in Dagger I got the sandstorm weather, with lampposts scattered all over the place projecting a rather gloomy light, and the vent exhaustions now have little pieces of...plastic? paster? attached to them, showing air going through them. Neat!