I was going to give a longer and pointed answer to a bunch of this but it's really simple.
If this is a formal debate thread about the superiority of Empire versus Federation technology in the fictional universes then fine--debate away (it will never end).
This was posted in the modding section but it was really a "what if?" post which i think confused the issue.
Apparently there is some real interest in this being a mod now and people are working at the start stages of ideas.
The fanboy views will not make for a balanced game and if the game starts that the Empire is a crushing juggernaut with untouchable ships then it isn't going to be much fun or else we all are going to play the Empire.
So is the point of the mod to play the Empire and get joy from crushing the other inferior scifi universes out of existence?
In a realistic scenario the Federation would ally with the Rebels--who didn't have that much of an impressive fleet in comparison to the Empire either. They'd fight guerrilla tactics and push research into new technologies. They would not remain a static, inflexible and hapless bunch with no clue how to fight back. In some ways it is clear the Federation is better at research and science--the Empire just focused on brute force.
For it to be a fun mod you need to argue less about "Why Star Wars must win" and more for what efforts you will really make to be sure its balanced. Right now it's imbalanced and that's the whole point of my posts.
I get the stated theory of your balance but your current arguments don't inspire much confidence that it's being really developed.
*facepalms*
None of my posts WRT SWvsST debating had anything to do with the balance of the mod. I've already offered my opinion that, mod-wise, the Empire would have somewhat fewer, but superior, ships, with poor maneuverability, but reasonable straight-line acceleration, exceptional superluminal transit, and wide fire arcs.
I personally have never argued that this mod was supposed to be "herp derp Empire crushes st00pid Feddies derp". I have always had the opinion that it would actually have balance to ensure fun, fair play between the factions in the mod. Not that the mod would resemble an actual hypothetical situation between these two fictional powers.
My posts WRT SWvsST debating had to do with the a hypothetical scenario. Now, to argue why some of your points are daft.
1. The Federation wouldn't ally with the Rebellion for the simple reason that the Rebellion is more interested in fighting the Empire, the Federation hasn't got a snowballs chance in hell of doing so, and the Federation is in a whole other bloody galaxy.
2. The technological gap from a weapons, armor, shielding, and propulsion standpoint between the Empire and Federation is simply too great to overcome. As has already been suggested, technological "stagnation" in Star Wars could be for the simple reason that they've figured it (science) all out. They've got nothing left to learn.
You're talking about a power that's been around for a mere several hundred years trying to research it's way into beating down a power that has:
i) A galaxy-spanning industrial base.
ii) A galaxy-spanning economy to support said industry.
iii) A galaxy-spanning dominion, providing enormous amounts of able-bodied personnel and/or materials.
And, to top it all off, the Empire benefits from some ten thousand years of technological refinement. There are some gaps that are simply to big to cover.
3. How would Federation guerrilla tactics work, pray tell? Because Federation warships simply haven't got the sublight acceleration, superluminal mobility, or firepower to take down anything more than say a lone freighter like the Millennium Falcon. Kinda hard to kill ships who's point defense gunnery measures in the low single-digit megaton range, when your own anti-ship weapons are just barely high double-digit megaton range.
4. On a board that I read frequently, a SWvsST topic recently came up, wherein the OP asked how a Empire vs Federation conflict would go if the firepower and durability were swapped. The problem is that the sheer industrial and economic might of the Empire, coupled with the superior strategic mobility of hyperdrive over warp drive, means that the Empire still wins. The fact that the Empire's mainline warships, the Imperial-class star destroyer, is in service in higher numbers than the Federation's entire navy, is quite damning as well.
Overall, SWvsST is like pitting a lightning fast, strikes-like-a-nuclear-bomb, horde of people against a handful of creative, average-reflex, average-strength people. It doesn't matter how creative you are, because the quantitative and qualitative advantages held by the opposition is simply too much to overcome.
EDIT: I'll also note that I am in no way part of balancing this mod, and that I've posted very little about balance. I actually no nothing about the balance of the mod that Theo has set up; your guess is as good as mine. What part of the mod that I think I've been 'contracted' to do is the backstory of how all these disparate scifi franchises have been brought together.