Indeed, game got a lot more stable with the Unofficial Patch. However, I've tried everything..and something really broke my main questline. I can't get "When Freedom Calls" (the quest you get once you find Preston) to start, so I guess I'll have to start over.
If you're using PC, just use console commands to start the quest.
That's the first thing I tried, as to finish Skyrim and prevent saves from being lost I had to pretty much hack the Matrix from inside its console.
There was really no solution.
It was one of two things:
- I left the Vault with a LOT of mods active, and that doesn't seem to be a good idea. Unless a mod explicity states it requires to be active since you hit "New Game" (Horizon is the only one I found that requires this), it's simply safer to leave all of them off until you leave the Vault. [I had no issues with Horizon + Unofficial patch active].
- The "Everyone's Best Friend" mod lets you take Dogmeat with you always, along with a companion. Even on Skyrim this sort of mod always broke all sort of things (including other mods), so it's one of the most likely suspects, as it let me bring Codsworth AND Dogmeat to the first mission in Concord, and I don't think you should be able to do that (Codsworth will say he'll take care of Sanctuary until you come back or something like this, on the beginning).
In any case, I haven't had time to play a lot so I'm not far, but it has been damn great.
What's hilarious is that I never played as a sniper as my last GPU could barely handle mid-range combat draw distances. Now, being able to snipe people from VERY far away with a simple pipe rifle and a scope, it really made Horizons' hard start much easier.
I'm still playing on 100%/100% dmg difficulty, as it feels like Vanilla 150%/100% for some reason.
And I had two amazing experiences now that it's on Survival:
- First Deathclaw, Horizon lowers the amount of Minigun ammo you get there. I didn't realize, and I had a half-hp Deathclaw furiously moving in my direction. I panicked and somehow managed to fire 2 clips with the 10mm Pistol close enough to his head before he murdered me. I was shaking a bit at the end.
- I was strolling happily around a known, "secured" area. A random goddamn Super Mutant yells at me, running at my directly, and I'm still badly hurt from last fights - Horizon has too expensive heals and even more expensive instant-heals on the beginning (and you have to craft 98% of those)..I panicked but managed to headshot him repeatedly right before he was about to hit me. That hit would definitely instakill me, and I think I was still Level 2. I have absolutely no idea where that thing came from.
I'm loving it.