Less recreating Japanese food and faster plot is a good thing. I can’t imagine the novel author has no input with regards to plot here. The plot does feel less thought out, what with the medieval army actually posing a threat to their fortress, the spy with nanom, and now with the bug mutation, but it may well be that these are the major points as laid out by the novel author and are well thought-out.
Trust the plan.
I was thinking less the food stuff, and more the "crafting and making magic and politics etc, and not having random space girl from nowhere that can beat sci fi tech with her body, kingdoms with overtech, and supernatural stuff" (like yes, it was obvious the story was going to tie this planet together with the seeded humanity, but
not like this 
).
But yes, it is quite likely they are actually following the plan. Or the LN might have exceeded the novel in material and they follow it instead. Or anything really. Just feels
different, imo, than how it was before that point where the spy appeared the first time.
