Disregard my previous comment, I just saw that charging the gun reduces my energy regeneration. As it is, the gun is not worth it. Too many crystals to level it, only to shoot for 256 energy. That would be good enough if it wouldn't ruin my energy regeneration. Having max energy regen is way more beneficial than the gun so I'm stuck frantically shooting invaders so that my gun doesn't get them.
Energy production is messed up in this update. The Nexus screen states it should be 0.15 from 3 buildings, but it's 0.08, as shown on the icon at the bottom.
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 "Save the Earth! - The Incremental -"){kind=icon}