Not surprising. It was a fun idea, but it really didn't have much in the way of legs.
I'm still going to sit and wait patiently for a proper Birth of the Federation 2. Personally, i'd go more for a Civilization-type 4X game. I think it's a bit more accessible than a Stellaris clone. I think taking the base of Civ 6 could make a pretty decent Trek 4x, it has the ingredients already there.
I really want something that isn't focused on a specific era. It doesn't have to be crazy expansive, I think it's reasonable to do something like 4 main playable empires like Infinite does. Creating a metric ton of units is alot of assets to create, but I think it's reasonable to have an "ENT - TOS - TNG" progression for 4 empires. You don't need 50 ships for each era. Going with a Civ-type model, break it down into archetypes... "Melee", "Ranged", "Siege". You can add more types, but I think those three would suffice. If you want to be stingy and make less work, you need 9 ships per empire (well, you need like, freighters and colony ships and what not).