It does already give you lots of energy storage, in the form of having so many power sources attached. Unless of course you're using Light or Micro type stuff, but otherwise you could store hundreds or even thousands via normal power sources or even Hybrid types!
Drained L-Cannon is meant to be extremely hard to fire. That is not going to change. Ever
It's not really even
meant to be fired except by the craziest folks who can actually pull off an entire run dedicated to the extreme requirement for firing it in an unintended manner. The difficulty of doing so is set based on how hard it is, so making it easier in any way would actually just end up leading to increased requirements, defeating the purpose.
