Poco Tehuantl:
I think a char with high HP, or Invuln, with such ability fall into Bonespikes comment in the other thread: of characters that can dominate combat scenes.
While less combat powerful characters do not have that option.
I've been in a bunch of games & what I've decided about V&V is that, while some powers are obv out of whack, combos of powers can really make things get interesting.
Oscillator is a flyer & has vibration control x2 (and a few other powers). So while that might not seem great, he can 'vibra-fly' through the floor, through the ceiling, etc. I didn't have it all figured out when I made him, but I had his Special Weapon have a 'Heightened Sense' which lets him sense vibration -- so he can see while in materials.
GM has ruled (rightfully, IMO) that Osc can't attack from 100% cover, nor can he breathe in materials (I'm not sure on that), and he's not allowed to pick up a baddie & drop them in a material -- but it's still sweet.
Other nice combos I've seen include High Agi & Absorption (allows a lot of absorbing per round), and an area effect ranged mental attack.
In this game, our team is sorta lacking in mental powers, which makes us susceptible. I have a new respect for offensive mental powers in V&V.
As for special attacks, I'll do them frequently if it will make a difference. Almost always have hero with some type of carrier attack.