Shard cannons can be outright used against armor though - I still don't really like where the ferrocannon is, similarly ranged large weapon mounts have better dps profiles (if not as reliable a burst spike to overload with since the projectile is so much faster than comparable guns) and there are much longer ranged weapons as well. Especially at the OP cost, I don't like it, and would rather have some railguns/needlers in small slots supporting squall batterys in my large. Gauss cannons on my support ships are still more attractive as long range support fire.
Blasters feel like they're perfect as they are right now, but I'd bump the OP cost up a bit more, you can get a lot of very dangerous alpha strikes out of them with magazines and combat skills.
I'd still like a few more medium missile mount options, as it is I use the quill rocket pod everwhere it'll fit (SHARDS HNRGH) because I can't stand wasting the OP on MRM pods :U only useful on destroyers/frigates where you're planning on killing ONE capital ship, as otherwise every other small (non-missile) weapon in the game has more total dps.
The dart is also a REALLY nice use of those normally useless small missile slots (I'm going to be honest and say the only times I see annihilator rockets hit anything are when it's me eating them or fighters using them, can't stand these either, so much dps going into deep space (I'm really bad at blowing torpedoes I equip on the first cruiser sized thing I see))
EDIT: Also, pleasings 2 haves a large quill rocket variant? I Have A Need to create an ENTIRELY shard based fleet (SHARD ENERGY WEAPONS?!).