Yeah I think we're all lost. Wiab was 27(?) chapters in the old way of counting including half chapters I think, but maybe it was going to be three seasons, I can't remember. But with the new way of counting it's 54 chapters, but now Ocean seems to be doing enough renders for three chapters in a release. When it comes out of the oven, it'll be a chapter I guess.
The numbers are just a false metric in my opinion anyway, the story can be divided however it needs - Ocean's always going to have some form of cliffhanger tension to lead to the new chapter.
It is planed on being shorter than SG, and has less LI's so less convoluted branching, but then the NTR side of it might add more complicated branching. So in reality, it's just going to be a while before there's any meaningful import option for choices to impact SG, and most of us will have already played enough SG without the imported data anyway.
I applaud the effort to carry across variables, but it's icing on the cake once it's all baked. I'm far more interested in playing ch4 to find out the how more immediate changes are resolved than I am worried about a slight flavouring to SG way down the road.
I'm not going to even try to count chapters by old or new methods. It's all chthonic algebra to me.