Pretty sure that's already guaranteed, considering what they've done to power armor. If PA isn't the big thing in the game, similar to Skyrim's Shouts, then they wasted a huge chunk on developer time by implimenting it the way we have seen thus far.
It'd be cool if we could like rip a power line post out of the ground and use it as a club while in power armor, and when done you can throw it away or break it down for crafting materials.
Cannon-Shield: too big and heavy for a person to wield but a devastating defensive weapon in the hands of someone in power armor.
http://static2.paizo.com/image/product/catalog/PIP/PIP33084_500.jpeg
Throw in an extended ripper-chainsword thing and it would be awesome
If anyone here has played Chaos Overlords(An old turn based strategy game. With a killer soundtrack I must add), I would like to see something like the Plasma Generator from that. That would be awesome.
It's basically this beastly plasma cannon that shoots massive powerful blast of plasma.
Also the monom rod from that game would be cool....actually most of the weapons from that game haha