I think an alternate animation for Energy torrent would be nice. I'm not a big fan of the wave the arm and an energy wave comes out.
I think something like the last part of Kinetic Melee's Repulsing Torrent would work, of course it would look better if there was a blast of energy like the other attacks instead of a wave.
The other idea that comes to mind is the character kneels placing their hands on the ground and the energy wave comes out, or even a two handed smash on the ground.
I like the idea of gun drone being a shoulder mounted gatling gun, but that would probably need to modify the power not just the animation.
If we're talking about changing the power and the animation, how about changing time bomb to a short range missile barrage. Have it be a location targetted AoE like rain of fire, the animation could start with the tech wrist tap and the targetting reticle, then the missile animation from the Malta Titan robots could be used.
One last suggestion, I don't know if anyone else mentioned it, can we get an alternate animation for all the single target rez other powers. I'd like to kneel down beside the downed person like the Vahzilok reapers do for the cadavers.