I've played through FMP twice now, and have to say it's quite involved. I have a couple of thoughts:
1. Have you considered adding something similar to a heavy personal armor, to bridge the gap between Personal/Jump armor and Power/Flying/Stormtrooper Armor?
2. I think an alloy based craft missile should be added, to bridge the gap between stingray and stormlance (I think avalanche missiles shouldn't be in the game, but I can just not use them...)
3. I feel the Alien Data Slates/Leader/Commander research is a bit wonky. I think there should be an order in how the research is given: Fusion Explosives (unlocking grenades/elerium bomb), then the delta radiation for stun launchers, then optronics and other related research, then plasma, fusion and finally antimatter for rail guns. You could change the research on Nuclear Lasers to come in after fusion/optronics, rather than introducing it with rail tech. It makes nuclear lasers available and useful. It also puts rail guns all the way at the back. As powerful as they are, that's fitting. Even if you run into sectopods early, they can be killed with high explosives/incendiaries/heavy guass (Had to do that during a terror mission)
4. The Battleship version where the power sources are in the center rather than the four legs is missing the diagonal "rear" walls that run along the upper left to lower right sides.
5. Are you considering increasing melee accuracy starting stats? The 20-30 it is now is asking troops to get killed missing their 4-5 whacks at the enemy.
6. There was some discussion earlier in the thread about what reseaching alien soldiers should give you in addition to what it unlcoks now. How about a ufopaedia entry of the alien's stats? I've been trying to figure out their states for awhile now, and outside of psionic control, I can't find a list.
Great job on the mod. It's thoroughly enjoyable. Except when you run into Ethereals and Waspites unexpectedly. In June. JUNE! I wonder if they should up after you research certain things? I had waged a fairly bloody war with the Sectiods and had rail tech in April this time around.