Hey there.
Just wanted to first say that this is an amazing mod and the work you do is very impressive. From what I can tell it is faithful to the source material without being completely broken. However, I wanted to put forth some of my observations/complaints/suggests.
First off, I'm not sure if its a bug or unfinished, but when I found an Imperial Navy Weapon Blueprint Package in game, the package didn't have any actual blueprints in it. It had the name and description of the package, but no list of blueprints like vanilla packages have. It even said I already knew all the blueprints in the package, when a look at my custom production tab in game proves otherwise. I'm playing with the Nexerilin so I'm not sure how that affects things.
Second, as was stated previously by someone else, the ai doesn't seem to be entirely competent with broadside tactics. Additionaly, my fleet of purely Imperial ships tend to collide with eachother and get in eachothers way. I'm not sure if this is because the ai doesn't properly recognize the size of the ships, but great annoyance has been had when trying to manuver in a large fleet. I'm not even sure if these are issues you are able to tweak in your mod, or if they are just quirks of the base games ai.
On a similiar note, many (if not all) of the Imperial ships have an annoying habbit of using their non-point-defence weapons to shoot at fighters and missiles rather than the actual enemy ships in range. I have seen Lunar and Gothic-class cruisers using their lance batteries as point defence weapons, when they should never do anything of the sort. And, given how crowded the ai makes an Imperial fleet durring battle, this has often lead to catastrophic friendly fire. I don't know how to make them stop, because if I set the weapons off of auto, the ai won't fire them at all. Again, I don't know if this is something you can fix in your mod, or another quirk of the base game, but I thought I should point it out.
Thank you again for the time and effort you put into this mod.