Concerning Teladi/Pirate Frigates:
First, both are crappy saucers; Teladi ain´t famous for their space engineering ( it´s pretty much X3 canon ), and Pirates have even less ressources to build their own ships.
That said, i´d like to see more significant differences between each of them, couple of examples:
1. Geochen - Teladi Flak Frigate? Fine, but not the Pirate version ( already ).
It´s appr. 9m/s more speed ( and a bit agility ) are a very expensive "buy" for the Pirate Geochen: -2Gj shielding, neglectable WRR, -1k cargo space, and all that for about 2mio, credits more? Ha!
2. Why whould pirates have restricted ( aside super high tech beam lasers, perhaps ) wepon loadout? Raven, Galeon, Brigantine - the all have at least PPC access. In my book, Pirate ( and Yaki, to a certain degree ) ships need more variety on usable weapons.
3. Pirate versions of those ships should not absolutely follow the path of their commonwealch pendants. What is a flak Frigate for Teladi, might be some super fast assault Frig. for Pirates.
Geochen lacks Flaks in its side turrets, so it could be even more specialized.
Just imagine you get the chance to steal/build together kind of such a ship, woulldn´t you try to specialize it in one, or two, directios, to pronounce the strong sides of your creation ( and thus, the original design ), instead of trying to balance it? Especially when you are a Pirate?
A Geochen of my liking would loock more like this:
- for sure capital ship gunns: no matter if the WRR is sufficient ´cause it´s a super fast, and light ship, but with "boom" potential for hit&run
- very agile, and even faster then right now
- definetly less cargo space then Teladi original, this ain´t an half armoured traider, this is a
pirate raiding ship!
- any standard gun available for them, flaks too, aside from high tech beam weapons, and no terran weapons too ( are also high tech, imo, at least in theory

)
- boarding pods usage is a must - it´s a freakin
pirate ship
Pirate Tern, on the other hand, i rather see as their Mobile Repair base:
- slow/ not agile: c.a. 60m/s
- perh. 2 docking ports for Corvettes is enough
- strong shields: 8 Gj, and rel. good recharge rate.
- no Frigate class gunns - flaks/fighter anti missile/anti fighter defence
- crappy WRR
- kind of hull regen. function ( repairs itself in time )
- build in Military Scanner
Carrack:
- NO friggin mainguns! ( please ) - it´s brother model, Astraeus has one!
- better cockpit ( bridge ) positioning
- specialization: Boarding ops. - IPG already available as weapon
- maybe IC in the rear turret, so it can manouver around, while laming it´s oponents?
- bit stronger shield. gens, perhaps. generaly, the ship is too weak for it´s price, and the purpose i actually try to assign to it
- build in Military Scanner ( for better preying on the weaklings

)
Talon:
As is, Pirate Assault Frigate. Generaly, i´d like to see all their ships getting better turning rates, and overall bit speed increas ( or if that´s too bad for collision aviodig, acceleration doubled, i´d say ).
Shrike:
Well, i don´t know, maybe an Assault Carrier for poorer Pirates?
Moar gunns, heavy Gunns ( side turrets need IBL!

). It´s not ment to be in a prolonged battle ( see: crappy WRR ), if it´s kind of a Gun Ship ( with frontal guns ), it has poor range due to IBL only, thus allowing Pirate using other weapons like PIC etc.
Well, just my 2 Cent, feel free to tear them to peaces
P.S: Frigate guns ( CiG etc. ) need speed buff up to their larger counterparts from destroyers. And maybe? bit more range - their damage is still low enough not to be that strong; plus - more energy consumtion if made better.
P.P.S: The poor Tenjin needs some love, too. It´s agility is even worth then some Corvette.
"Only fools seek power, and only the greatest fools seek it through force".