Good start CeJay,
I like how you are going back into Trek history and UT history as well to build on what I feel is going to be an epic story. I also look forward to seeing how you handle the Agamemnon crew after writing the Eagle crew for so long. I know how it can be to get attached to a certain set of characters and the challenges that you might face in trying to make a new, or relatively new, crew distinct from your regulars. Granted you have already laid the groundwork, especially for Donners, but I this is still their first time really in the spot light.
Doing a spin off is something I've considered but have yet to find the right mix like I think you have.