ok, starting with sheepmonster's thoughts (no, i don't hate you or think you're evil- constructive criticism is just that- constructive).
1. Switched TIE Hunter and TIE Defender- my fault
2. Here's a quote regarding the X/E-Wings contrary to what you said from sw.com- "Later, with the introduction of new fighters like the A-9 Vigilance Interceptor and the E-wing fighter, the X-wing was pushed from the limelight. Eventually, after years of research and modification, Incom unveiled a new faster Incom T-65AC4 fighter that can compete on its own in the modern starfighter combat arena. " If the T-65AC4 was able to compete with E-Wings, certainly the XJ1, the most advanced starship of the Alliance, could as well.
3. I switched the K and B wings so that the B-Wing is the sucessor the Y-Wing in era 3 and the K-Wing is just a more powerful experimental non-hyperspace bomber alternative in era 4.
4. I thought i read somewhere that the TIE Droid was developed around the time of the Battle of Hoth, but now looking it seems you are right about its debut at the Battle of Mon Calamari, shortly after Endor. I reworked the entire TIE lines in fighter, fast fighter, and experimental fighter to show this, so take a look at it and comment/constructively criticise. BTW, i know i have the TIE Advanced as a fast fighter, but to ensure it is not mass-produced, it will be EXTREMELY expensive.
5. I have no problem abandoning the exact size scale to allow for an eclipse star destroyer.
6. I only used the whole basic>advanced when absolutely required, and never when i had other alternatives. It'd be pretty boring to have basic>adv>heavy>etc. in places where good alternatives are availible.
7. Fixed AAT thing.
8. I had this discussion with odintheking earlier, but here goes. The upgrade of one unit to another does not literally mean that the first unit morphs into the second, it just abandons the first unit and its weaponry in favor of a different one. After Episode I i didn't see any STAP, so it is safe to say that, for whatever reasons, the CIS considered them obsolete. However, in the Battle of Geonosis in Episode II (represented in the Unit Tree by eras 2/3) the CIS used Orray Troopers, despite their primitiveness. However, they will probably be only slightly stronger than the STAP to show this. I just thought it'd be cool for every civ to have a mounted unit.
9. However, in other places in the Unit Line, the gaps were filled with whatever possible units could make sense. For example, all of the defensive units in Era 1 are pilots, and in Era 2 the Empire uses terrain-specific troopers (snow/sand) so my insane logic here makes sense. By Imperial Guard i mean the Royal Guard, but not the ELITE Royal Guard (or, to be technical, the Sovereign Protectors). The Elite Royal Guard is too few in number to be part of the mod, but the Regular Royal Guard is sufficient. They looked the same (big red guy), only that the Elite Royal Guard stayed only with the Emperor and had minor dark-side-of-the-force-wielding capabilities.
10. I didn't realize there are less Clone War Units than GCW units- i thought they were about equal. The only spots i intentionally made less units was for the Republic in Era 1- they will have fewer offensive and more defensive units for Era 1 seeing as the Republic hardly did anything militarily during Episode I. If there are less units in the CW than the GCW (it doesn't seem that way to me, but if it does to anyone else . . . ), then if anyone has any spot filling ideas i am, again, open to them.
11. I have no problem focusing on the first two (CW and GCW) before really working on the YV Invasion.
12. Regarding unit graphics reusing- i stress that i only do so when the ships look almost exactly the same or are exactly the same with minor upgrades that are either not visible or need not be shown. (eg, basic hoth turret>advanced hoth turret, TIE Fighter Scout>TIE Fighter, Battle Droid;Droid Pilot, Clone Trooper, Jedi Defender Clone, etc. etc. etc. )
@ odintheking- i'd like to strive to be as accurate as possible, and chronologically would probably be the best way to do things.
Heres the edited (for the fourth or fifth time, i've lost count) unit tree.
http://www.civfanatics.net/uploads10/Unit_Tree_4.ace
I would just like to point out that this is for the purposes of getting an agreeable unit tree for the entire mod asap. Comment now, or forever hold your peace.