Going monthly pretty much always ruins a stories pacing and slowly kills it, but I guess its better then never coming off hiatus and there's nothing to be done about it.
Perfectly fine with the one big chapter every 3 weeks. Splitting them up is a bit silly IMO anyway. Should just release them together in the first place
I wholly support combining the chapter parts into one chapter. I was actually worried when I read the author's note about the chapter parts, so reading the scanlator's note at the end was a relief. ^_^;