So...wall of text AND spoilers incoming.
I've really liked this campaign. The post capella setting, the richter story, the capital ship missions, the boreas missions, it's really cool. I'm starting act 5 right now, but i had to skip 4 entire missions to get there. Here goes my experience in case it helps:
Lightning in Heaven No way to defend the aksha (vasudan ship with admiral tet), too many missiles to intercept, cruiser's missile launchers are really tough to take down, loads of bombers. Never get to see the gabriel come and save me.
Solar eclipse Pt. 2
No way to defend the gate, the regular laser cannons (not the beams) just cut through the eden installation, and without bomber availability in the previous mission, i can't take them down fast enough even if i have a full treb loadout. Even if the enemy bombers never get to hit the installation...
Plans to negotiate Lindos (Galahad) reaches the node but never departs. I managed to kill one rigelian bird (after 72 minutes of play) but i couldn't finish the mission because I'm guessing it should depart? (From dialogue).
A Caucus for peace
Those 2 destroyers destroy the Katrina and there's literally nothing I can do. I've killed every fighter, bomber, escort, diplomat, when the 2 vasudan destros come in, no matter if i send everyone to disarm one, and i take the other, the katrina always dies. And before it does, it clears me from the objective (cover the katrina) and then it gets irremediably destroyed. I must have played the damn thing like 20 times, put the difficulty in super easy, nothing works. I hate this, because i really liked the campaign and don't want to just skip missions but they're definitely impossible.
idk if it's bugs or what but i can't do it. Never happened before in any campaigns I played.
I tried lowering the difficulty in all these missions but it seems like nothing changes
Hope it helps.
Despite this, i really liked this campaign