As I understand, "the followers" are supposed to be your personal faction, with you as the leader, but at the same time there is a hidden relationship meter with them, too (which can drop and improve as with other factions). Is there a way to see it without flipping showInIntelTab?
Well, you can check the relationship band (when it's positive) by going to the military base submarket and seeing if anything is unbuyable at least.
Also, is there a way to form and disband pacts manually?
At present, no (barring the CreateAlliance and LeaveAlliance console commands). This may be implemented in the future, but when I can't say.
I searched but couldn't find an answer - is it possible to increase market size at some planet/station, and if yes, how? I guess the station perks like industrial complex/supply workshop/recycling plant are predetermined and can't be built by the player? Likewise with the population...
There's indeed no player control over markets at present; this will probably have to wait for Starsector's industry update (generally expected to be the next major one, coming at the end of the year). I could put my own implementation in Nexerelin before then, but given the UI issues involved this is unlikely.
Can't do much about the already-captured planet locking you out, unfortunately. You can use Console Commands to remove the tag if you know how, but I'm too lazy to look the exact code up right now...
I just encountered another case of my planet locking me out. This time I approached it with the transponder off. There was a huge hostile invasion fleet orbiting it, and a tiny fleet with its transponder off circling the planet and the invasion fleet. I docked but couldn't do anything because "at least one followers patrol was tracking my movement". It appears that that tiny fleet was my faction patrol, but I couldn't even catch it to allow it to do its scan.
Even if I turn my transponder on, my stupid faction wouldn't allow me, its leader, to do anything on his own planet because of some tiny patrol (which, by the way, is happily flying around with its transponder off!). Frustrating to no end!
I understand all this stems from the fact that "the followers" are hacked to be "your" faction but in reality it's just a common faction with all its traits - it could become suspicious of you, it could even become hostile as evidenced by the hidden relationship meter.
If it has its transponder off it's likely not a patrol. Also, the followers by default don't care if you dock with your transponder off, even if a patrol is chasing you at that very moment (just tested this, though not with a recently captured planet). Did you change anything else in the config?
Yeah, the hacked-faction handling of the followers faction isn't the best. When Alex implements full support for your-own-faction assets I should at least be able to adjust it to work properly. Or I could attempt a refactor now to put things under
player.faction, although this may not work right for a few iterations (or ever).