I feel the no# shields mountable is okay (a couple of the custom ships even ought to have them reduced), but I think it'd be nice if you could increase the no# of mounts for shield-type items, e.g. the injectors. Reason being, those use energy also, so you'd have to be careful to purchase only what your powerplant can handle. Some ships I've seen are pitiful, they have like 1 slot for a shield, and 2 slots for shield-type items. On the other hand, overpowered ships (like non-capships that can mount lvl 10 shields, ugh), those should have reduced no# of shield-type items. And while you're at it, I do believe a non-capship should not be able to mount class 10 capship shields.
You could beef up the LFs that way, too. Since they can only carry one low-class shield, give them an extra slot or two for shield improvements, so they can beef up, say, the regen rate by buying a bunch of injectors (or whatever the item was, I don't recall off the top of my head right now). Gives LFs a little more much-needed margin of safety and makes them a bit more viable to play longer, since afaik everybody's preference is either a VHF or a capship.
" In Defeat, Malice; In Victory, Revenge! "