Wow that one site has some ships for EA that I have not even heard of before!
Also another idea that I wanted to recommend was the use of planet bombardment. I think that missile animations should some how be changed to look like landing craft because with the exception of the mass drivers and the planet killers actually landing troops was way more common in Babylon 5. As stated in earth minbari war there were tons of battles fought on the ground and I think it would be interesting to see this mod reflect that. So for example things that improve planet health say that they improve ground defenses and station additional ground troops.
In addition I would like to suggest a new idea for planet health restoration. What if there was a way to some how land your own forces on your own planet to help it regain health faster. This would be sort of like bombing your own planet except your dropping reinforcements instead of bombs. I do not know if this would be possible but it would affect the game tactically in the following way:
Enemy attacks a planet with “landing craft” this ability does damage to the planet over time so that even if that ship leaves the planet continues to take damage until the effect wares off (ie the army that landed was defeated). This could be accomplished by giving the ships that would attack planets a special ability that allows such a thing to occur every so often, perhaps reliant on anti matter. However such ability is not required as you could possibly tie some other effect into the normal “weapon” of the given ship.
If your planet is taking heavy damage and you do not think it can hold on or if it is at low health you can use your own “landing craft” to help boost planet health and thus recover or negate the effects of an enemy attack.
Let us take for example two ea landing craft attack a planet one from team A the other from team B. The planet from team A is attacked by team B using a landing craft. The planet will now take X damage over the course of X time. To negate these effects team A uses its own landing craft on the planet and restores X damage over X time. This assumes that both have the same upgrades for ground combat training and ground based weapons.
I am not sure if such a thing is possible but I think that it will greatly impact the combat in the game and make it more similar to how things work in the Babylon 5 universe. Some races like the vorlons and shadows would not be really affected by this and that would also lead to more dynamic tactics as they have no way to negate landing craft by using their own to defend because they have none. Other races like the Cintari would have more of a hybrid tactic as they can utilize landing craft like the other younger races but also have access to weapons that destroy planets like the older ones do.
As for the tech trees that seems promising and having a limit of 3-4 pre requirements is good to know. I will look into trying to make a flow chart of the ones stated here along with my own this weekend.