For now I will disable the whole distant stars dlc. As much as I love the events the dlc provides, the l-cluster started to become a huge pain in the ass. If I have a l-cluster in my space or close by I basically can restart the whole game, as if the grey storm pops out I will be busy fighting it until the end game, becoming unable to do anything else, maybe even die. If the l-cluster gate is not close, the grey tempest often destroys or at least weakens some of the strongest enemy ai empires in the game, causing weaker and incredibly friendly/boring empires to conquer them turning the whole action packed galaxy into a one/two federation peace festival. I end up having nothing to do until the end game crisis, as nothing to challenge is left (I absolutely love one genocidal empire eating a federation or other boring peach empires, so I get a bigger threat, which I can fight).
Even if the l-cluster turns out empty it later tends to become a huge pain, as the end game crisis likes nothing more, than using it as super highway spreading its territory like swiss cheese all over the galaxy. Sure, u can say this increases the challenge, as u are nowhere safe for preparation, but this also means that ur crisis fighting fleets have to be at a dozen places at once. Especially with the unbidden this is horrible, as the anchors cannot be marked on the map (u have to click manually through hundreds of systems on huge maps and good luck doing that through a galactic storm, which prevents ur sentry array from looking in said systems). Also the unbidden tend to instabuild new anchors by simply taking one system, so if a single fleet is on the other side of the galaxy u have bad luck and cannot destroy the portal. U end up in a infinite anchor chase until either most of the ai empires, which build new outposts for instatakeover anchor building either are dead, or u die. The only strat there currently exists against the unbidden is to crush them as soon the pop up, not allowing them to reach one l-gate.
It already ruined too many games for me. I rather sacrifice the spawning of the corrupted avatar, tianky matriarch, voidspawn, scavenger bot, rattlings and prikikki ti and other special systems.