I actually assumed they were talking about Hecates only, but I may have been wrong. Also the UEF or even just Laporte might not even have decent numbers as far as the size of the GTVA armada.
If I was admiral Calder, I wouldn't want everyone in the UEF to know that the Tevs have 5 times the force they're crushing us with. I especially wouldn't want them to know that they had a 3 sets of the new stuff.
So...the Orestes and Temaraire are being examined piece by piece, system by system. . . for let's say. . . 6 month?
Training of two completly new crews...well...
In you serve nine month in the Bundeswehr...so i guess...one year for the normal desroyer crew...officers will be simply draft picked from other destroyers...or the crews of ships reaching the end of their lifetime will be transfered.
So...on one hand, Steele's chances of winning would greatly increase with another Raynor and Titan. . . but on the other hand. . . he's not the guy having another Raynor-class in system stealing him possible victories...
I believe the one thing that the GTVA isn't lacking is well trained personnel. I'm guessing there are masses of officers from cruisers, corvettes, squadrons, or even non-combatant craft FIGHTING to gain command of the Orestes, and that the crew members working on say, reactor systems, could be drafted in from working on cruisers or corvettes, or even decommissioned Hecates.
I think that Sevaranti - if given a Raynor, would probably have not succeeded just as badly. Steele's not winning because he has a Raynor (although it helps) he's winning because he's using the capabilities of every ship and commander in his fleet to destroy things. The Carthage has twice the survivability under Federal fire than a Hecate? Use it as bait. The Impieriuse can destroy a Karuna in one salvo? Use it as the trap.
Speaking of what can destroy a Karuna in one shot - a Bellerophon and a Hyperion cruiser, two Chimeras, a Chimera and three Hyperions, and 3 Hecates. Obviously the Serkr configuration would work as well.
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Those numbers are around about how I imagined the Galactic Terran destroyer strength to be by the time of AoA. Good call 
W00t! Battuta filled me in on a rough number, only thing I really had to guess at was the number of Orions and if there were any more new destroyers.