Just finished wading through your massive set of updates. Great writeups! The massive scale of your campaign continues to impress.
The communications issue continues to intrigue me. Your assumption of instantaneous comms across the length and breadth of your empire simplifies matters greatly, not only allowing the coordination of forces across multiple systems, but allowing you, the gamer, to not have to deal with light speed delays, or comms that depend on courier traffic. It makes it easier for you to control your empire and perceive the big picture, and also gives your campaign a more "modern-day" feel, as you have nearly instantaneous comms between ships and worlds. Whereas in my campaign, with no FTL comms, communication is limited to light speed within a system and to courier or other ship speeds between systems.
My campaign is much smaller than yours at this point, but communication takes much longer, obviously. The times (by courier) are as follows:
Terra to Victory Base in Groombridge (14.6 billion kilometers): 17 days
Terra to Shield Base in Monoceri (9.32 billion): 10.9 days
Terra to Bastion Base in Chi Draconis, beyond the frontier(12.1 billion kilometers): 14.1 days
Terra to Omega Ceti system, new swarm location (22.6 billion kilometers): 26 days
Compared to your campaign, my campaign has a more World War I or even 19th century feel to it, as comms are limited and frontline commanders have great latitude and independence to do what they see fit without referring to higher command.
To be honest, I'm not sure I could manage this setup in a campaign the size of yours. The complexity of tracking who knows what and when they knew it would likely become unmanageable in short order.
I noticed that in your first post from yesterday, one of your carriers launched an attack using its missile equipped fighters. I was particularly interested in this as this is a major issue I'm dealing with in my campaign. The Imperial Terran Fleet's initial design concept was large beam-armed combatants, supported by smaller specialized escorts and patrol craft. The demands of engaging the swarm have forced me into deploying carriers with small fast fighters equipped with missiles. I have struggled to design carriers that carry sufficient fighters and large enough magazines to rearm to the fighters for additional attacks. Currently my carriers have magazines large enough to rearm their fighters twice, giving them a capacity for three strikes before needing to reload at a colony or munitions ship. I keep thinking I'm doing something wrong and that I should be able to have larger magazines, but after reading about your carrier strike I realized that I'm probably just channeling a previous version of Aurora in thinking I could cram more magazines into the design.