Still playing Scy; have not seen everything. Here are a few powerful standouts I noticed so far.
* Lightweight Armor(?) hullmod: For a player who can kite with long-range weapons, avoid taking hits, and has Damage Control 10 (for hull regeneration), this is an extremely powerful hullmod. Best in a chain-flagship fleet, where the player intends to pilot every ship in the fleet one-at-a-time. Possibly not so good for AI and fleet actions because cannot AI kite like the player to make the armor penalty worth it.
* Piercing Railgun: This is like a super kinetic AM-blaster for the purpose of overloading shields. It is easy to overload the AI with two or more of these then finish it off with something. Damage it does to armor and hull is not too shabby either. Probably too strong.
* Heavy EMB: Not overpowered per se, but probably underpriced for what it does, despite awful accuracy. This is much like a plasma cannon that trades accuracy for much cheaper OP cost. Probably worth more than 20 OP, but perhaps comparable to the ballistics' Mjolnir (which has less DPS, but better accuracy, flux cost, and range). This is a heavy weapon I would gladly use instead of Heavy Blaster if I have OP to spare. For a heavy universal, I might pick Mjolnir over this, but maybe not.
Will post more if I find more to comment on.