I like the idea of multiple ethics choices. You could actually change the course of the galaxy at that point. Well, keep in mind, we can create ten races, and use Faction names as Good, Evil, Neutral.
You've got the Bothans, Mon Cals, Wookies, Hutts, etc for major races, and you can do races like the Rodians, Gands, etc as minors.
Nuetral can be Smuggler's Alliance, Bounty Hunter's Guild, Mercenaries Guild, or combo of them. Those that don't like the "good" nature of the Alliance/Republic, but hate the Empire. I myself always picture Nuetral as thinking the good guys don't have the stomach to win, but they still hate the evil ones. And in quite a few books, that is how those groups are portrayed.
The "Race" image and description can involve multiple species. It would just be a faction vs. a race.
multiple requirements is a bit tricky. I think we should just have either quite a few intermediate techs in between, or longer tech times (Which will decrease as you research and build tech facilities). You'd either have to research nothing else while getting the ethics techs, or you'd have to wait until it was a manageable level. And the bonus from that tech might just have to be something inticing

.
There was one guy doing a warlords mod who said he had 200+ star wars models, but I can't find any way to contact him. I'd love to get a modeller going with those.
As much as I would love to capture ships, I doubt there is anyway to allow us to capture them. It's just not hard coded into the game. We may have to wait and see if a patch or the expansion gives us the option. As I said before, I've got three weapons tech trees. Starfighter weapons (Small, weaker), Capital ship weapons (Larger, but more powerful), and missile weapons (Missiles, torpedoes). I'd like to find a way to restrict certain components to certain size ships. That would make the starfighters a good choice with capital ships too.
Here's an example of my Capital Weapon Tech Tree:
this one took a bit more creativity to make, as I found less info on these than fighter weapons.
1)Taim & Bak AX5 Laser Cannon
2)Taim & Bak AX8 Laser Cannon
3)Dymek HL-5 Twin Laser Cannon
4)Dymek DL-2 Dual Laser Cannon
5)Dymek LT-6 Triple Laser Cannon
6)Taim & Bak BX8 Quad Laser Cannon
7)Taim & Bak CX3 Light Turbo Laser
8)Taim & Bak CX3a Dual Light Turbo Laser
9)Taim & Bak H9 Turbo Laser
10)Dymek TL-8 Turbo Laser Cannon
11)Dymek TL-10 Heavy Turbo Laser Cannon
12)Dymek TL-X1 Turbo Laser Battery
13)Taim & Bak XX9 Heavy Turbo Laser Battery
14)Taim & Bak XX0 Double Turbo Laser Battery
15)Borstel C-5x Triple Turbo Laser Battery
16)Borstel C-7x Quad Turbo Laser Battery
17)Taim & Bak X10 Twin Heavy Turbo Laser Battery
18)Gyrhil D-8x Dual Heavy Turbo Laser Battery
19)Gyrhil E-0x Triple Heavvy Turbo Laser Battery
20)Gyrhil G-1x Quad Heavy Turbo Laser Battery