I just finished a playthrough where I went in alone at the end. Killed Furrante at the end of the Principe missions and Aeldys on the island itself after I pretty much stole the ghost-ship from her (she followed me apparently) and while I didn't had Serefen with me for the majority of the gameplay, he seemed alright in the small ending text about him. He become the new leader (or one of its leaders it wasn't very clear) of the Principe.
None of your followers leave I think. I only had Mia as a faction follower this run, but she was fine with supporting no-one, as she seemed slightly annoyed with the lack of cooperation from the mayor powers.
As for the topic; Does the factions always stay so extremely generic? I pretty much told them Eothas was going to destroy the wheel and maybe even end the world, and they still sticked with their stupid reasoning. The world is going to end, but no I got to think about the trade. Or lets raid the lost old city. Or nobody is welcome except us, it's our lost city, etc.
Maybe It was because of my decisions I made, but I highly doubt that. I agreed with Eothas reasons to destroy the wheel, to pretty much force everyone to work together to overcome the catastrophe. I tried to steer everything in that line, sparing as much people as I can, helping everyone, trying to create alliances, but didn't seem to do much for the main factions. They all sticked to their generic reasoning. The only one that I thought might wanted to cooperate with another faction was Canta Nirro from the Vailian trading company, and he got banned right before the end, and taking over by Alvari, (Which I couldn't stop because of some choices I made) whos first quest was to blow up the Royal company....
Was a mayor downer for me in the game.
well the world isn't ending as such...just the heaven and hell part gonna be broken..sorta lol so those who are alive , of course they don't care . It's all about the now and the here . Add to that , when you meet the leaders of the factions..beside some 'reports' , they didn't see what you saw and they don't even know you .
yeah , it's kinda sad you can't get them to agree in the end . Mind you , maybe not all of them since they have different goals . But would have been nice..
Maia will try to leave if you side with Valliante . romanced or not (I was romancing her when she told me she gonna leave ) and turned the valliante down cose I had no plan on siding with zerka corp !