They stopped because it felt like a job the members, and when they founded the band, they agreed that they'd quit if the instant it was no longer fun. Since they're all good friends and I'm sure they all had a wonderful time with the band all those years, I'm sure nostalgia will bring them back eventually :D.
When I feel depressed I always listen to their songs, crying and feeling like shit. But then there are these wonderful melodies like the Chorus of "Clawmaster" or in the end of "Breakwater"....it gives me so much hope and relief that everything, even our saddest moments, have some bittersweet beauty in them.
I've found this band at the lowest point in my life. I just got dumped and abused by my ex gf's friends and some of them were my closest friends to me, and i lost them all. Just because she was blaming me for things that werent true, i am utterly depressed and devastated .. i truly loved her and among other more personal shit i want to truly die or run away.. i have nobody left.. but this band definitely brings me back to life in a way
regarding ghost brigade, I've never felt any lack of guitar soli. I'm sure they would rather be destructive for the atmosphere their music conveys. there's no "progression" needed, they are perfect as they are.