Possible source of inspiration
Hi all. I stumbled upon this website a few years back.
http://efni.org/It is a very interesting read. It basically does to Babylon 5 what BP WiH did for FS - make it more realistic and in-depth.
This page in particular details what could be thought of as a 'poor-man's energy shield.'
http://efni.org/Interceptors_EWeb.htm If something similar was used in FS, it could even the odds between beam armed and non-beamed armed cap ships.
The duel mode turrets - that can shoot a burst of blobs followed by a beam is also an interesting idea :-)
NB - I have a feeling that the person who wrote it may not speak English as a first language, so expect a few grammatical errors hear and there.
Hope this helps :-)