Personally I've always thought it would be nice if the game mechanics made it harder for a cap ship to re-engage so there would be no need for these rules. It would add to the immersion as well, cause as it is there is no in RP reason to not cruise and re-engage often. The different cruise charge times has definitely helped. The other thing I had thought of before was altering the cruise speed for different ships to help, not by much, just enough, like changing it to 345 on caps or something.
As for the power drain idea, i think it is interesting, right now I am kinda on the fence, I'll think on it more though.