Given that the Hecate class is superior to the Orion in terms of being a Destroyer (In FS terms), it'll eventually replace every Orion. The reason why the Hecate is armed lightly in anti-capital ship warfare is because bombers are definitely more effective to use against Destroyers. The Hecate is excellent for carrying task forces and can defend itself better than the Orion can against enemy bombers.
The Hecate is what???? You need to have your eyes checked or take a colser look at the Hecate . That thing has superior C&C abilaties and superior fighterbay capacity to the Orion as well as superior aaaf defences when compared to the Orion but that is about it.
Its AAAF Defences are adequate for a ship its size but they are not formidable. You want formidable take a look at the Aeulous or the Deimos. It's heavy beam cannons suck big time so much so that an Aeoulous would be a threat to it. Not to mention a Lilith cruiser or a corvette.
It can defend itself gains bommber much better then the Orion but it can not defend itself all that good it is still underarmed when it comes to itys aaaf defence screen.
What you dont believe me? Fine go check for yourself.
The logic behind retiring of the Orion is just not there. Since the Hecate as formidable a carrier and C&C ship is its pretty much useless agains anithing else . It can not offer direct support ot the front line units without getting trashed and then spend week in the repair yards.
It can not attack directly ANYTHING larger then a cruiser and hope of coming out on top with minimal damage.
So my guess is that the GTVA wanted the Hecate to be a jack of all trades with emphasis on carrier and C&C duties but kinda failed at it miserably. It would of been a much better ship had it had 180 or 200 spacecrafts in its fighterbay and had it had 2 fighterbays instead of one.
The Hecate is good but its not that good.
The Hattie is even better but its still not better then the Orion . Unless we hammer the Orion because of its very limited aaaf defences.
But then again thats what you have cruisers and corvettes for no?
Also had the Orion been that much expensive to retrofit with beam cannons and new tech then they would of just scrapped the program from the beginning and remained with just building Hecate's instead. My guess is that someone in the GTVA high Command still has some brains and oposed such a decision which would of been dezastruous for the GTVA.