I beg to differ on the first. They can be very hectic when sounding the alarm and are masters at area denial and boxing you in. Imo, they're the most fun strategic wise. Good area denial via Obelisk.
Not sure with so much terrain complexity and deformity in H2 (as opposed to flat H1) if they'll be able to create the Obelisk. I'm sure it's giving Arrowhead a ton of problems as the walls need to more or less hug the terrain, in a semi straight line on the vertical. That collision code...
I guess they can soften it up and make the wall a particulate effect, much easier to work with.