Personally.... I like that it disables your energy weapons completely. I mean... it's basically a fire at will on overload. That's the equivalent of using the Dreadnought's phaser lance at every ship you're facing, and I've destroyed ships entirely just using the Lotus.
Now, the fact that it drains all instead of 75 is a bug, so they should fix the bug either way. Just saying, it makes sense to have weapons disabled, if only for a few seconds.