I... really, really want to like Nexerelin, but the invasion mechanic has sucked almost all the fun out of the game. I established a single colony on some water world way out in the middle of nowhere, and I've spent the past year and a half of game time camped out on it fending off invasion after invasion, all of which were Superior/Superior despite having fully upgraded star fortresses, high commands, and ground batteries with alpha cores in, orbital works with a pristine nanoforge, and fleet size +400% on a size 7 or 8 world.
Granted, I took the Pirate Start, so literally every faction was hostile to me except for Pirates, Kadur, and the Independents, but even so. Dassault-Mikoyan has sent invasion flights while I was busy fighting off their previous invasion fleets. I can't leave my colony even to go to the core of the sector and back without missing at least one invasion. Is it really supposed to be like this?
Well, if you're hostile to almost everyone that's not going to work well, yeah.
That said, I'm changing things so that if the player has a pirate commission other factions won't invade player colonies (same as how they don't invade pirate markets). Other relevant changes: fixed a bug where invasion autoresolve strength was still using market size mult, limited simultaneous invasion events to 10, and reduced invasion point accumulation the more invasions are currently active.
Some question on player faction invasion. I have saw my faction want to send out invasion a few time but all of them end in "invasion fleet fail to gather", I had check on one of them and see a invasion fleet(only one) spawned from the planet, then the invasion end a few day later with the "invasion fleet fail to gather" message. What is causing these?
There may be a bug with invasions from player markets (even if I can't imagine what would work differently at this particular moment), I'll look into it. Thanks for mentioning!
Is it normal for my own faction to start its own wars without consulting me? As soon as I started the faction, it started to declare war on others and sending invasion fleets across the map.....also what's the point of other factions sending me expeditionary forces (shouldn't this be a declaration of war, but isn't)?
1) Player diplomacy is a bit of a WIP currently, but one thing I made it unable to do is do the 'declare war' event on someone else (or any of the other diplomacy events whose descriptions imply deliberate actions by a certain party.) Other people can still declare war on you, of course.
If you (or anyone else) sees it again, a screenshot would be good perhaps?
(In the meantime, if you want it to just stop all diplomacy with the player faction completely, there's a
followersDiplomacy option in the config file. Bear in mind that it also prevents automatic ceasefires.)
2) The expeditions are vanilla behavior that I could remove but haven't yet felt a particular need to (among other things, mid to late game is kinda easy enough as it is). There's a bunch of discussions about expeditions in other threads you can search for, including complaints like the non-declaration of war thing.
All factions can respawn one more time. After that, they're gone for good. You can also set them to respawn infinitely if you want more chaotic undying game.
Faction respawn is currently disabled and likely won't be reimplemented in time for next version. Although next version, you can give away a market to a dead faction if you want them to (re)spawn.