I've used all of the medium and smaller weapons extensively and i don't see a problem at all beyond the M rail gun costing the same as the hyper velocity while being slightly better than it. I'm just getting into large mounts but stat wise beyond increased range they don't look that crazy. I'll do a ton of simulation runs to see if i can cheese anything.
If anything this just might be a better argument to do more built in weapons for the main turrets while leaving the secondary weapons free to mess around with. You'd remove a ton of balance issues while having the ships perform as intended.
*Did abuncha simulation testing and i've come the conclusion that it's a horrible metric for testing. My ships won handily across the board against higher DP ships but that's because they have terrible loadouts. One conclusion i've come too is the BC's all could use a 10 DP increase because the hachiman for example can handle 40 DP capitals easily yet it's only 26. The cruisers and BC's are out performing their DP in cost but that's an easy fix of increasing that. The bigger capitals are going to be a little harder, the 50 DP battle carrier handily thrashed a 60 DP paragon and fiddling the DP isn't the answer because of the DP limit. The glass cannon concept is solid i feel, less flux to ensure that they must stay at range and exploit their chosen weapons rather than being able to stay at range and have enough flux to fire while keeping the shields up.