Doesn't in the new story EA had two axis of attack after occupying the Beta Aquilae? This would require the secondary command ship, not to mention making it a huge carrier fits as expeditionary command ship suitable for long campaign far from your own home territory. Additionally Nemesis might be too precious and single ship to actually be everywhere at once.
Daegon is a nice model too, but doesn't it far lower poly comparing to Santuary/Orion phase 2 - not to mention Sanctuary looks like Auriga on serious steroids while Daegon looks a bit away from Auriga style.
It would be nice for EA to have super-carrier especially if GTA has several Odins and Warlocks on their side.
Ross 128 offensive was probably lead by some standard Tereus/Lindos or maybe another Auriga carrier. Nemesis is only example of unique super-capitalship in EA fleet.
In case of Sanctuary, it's actually not higher poly than Daegon. Current Sanctuary is MediaVPs Orion with low-poly Orion Phase-2 segments. While I personally like the design, history and the whole Sanctuary stuff in BP, I hate current model that is terrible abomination with bad geometry and multiple underdetailed places. Current Sanctuary is kitabash of two models and an abomination from experianced modeller's point of view. I believe Darius wanted to have any
improvement of old Hamano's Orion Phase 2 and while current Sanctuary model is better than low poly one, it still requires a lot of work. BP guys are probably have much more important things to do... The same as our team.
And in case of GTVA warships:
This is GTSD Bastion - an unique flagship of the whole terran navy, comparable to Nemesis. There are two mentioned Odin destroyers in Nostos, but none of them is part of regular fleets. In case of Warlock carriers, as far as I remember [according to INFR1] only two warships of this class were ever completed - presumbly original GTCa Warlock and of course our beloved Independence. So we have basicly three supercapitalships in regular terran fleets, and only one is pure warship.