Yep, that chapter is not a spoilerous one in any way, imo.
What I do think, is that miura soon changed his mind about that particular chapter, deciding not to include it in the tankobon release, trying to erase it from the coninuity. Furthermore you can read Miura's way thinking about the concept of "God" and his representation in his manga in one off his earlier interviews (witch i suggest to read it).
I never took the time to check if the time that particular interview accured after the lost chapter was published, or vice versa, so the exact story is something I'm not sure about, but anyway it is likely the reason is just Miura regretted having pulled God (or at least something that is his equivalent in the berserk world) into the story.