Writing style specifically? That's just from how he writes updates you know like "fight-> choice menu -> sleep menu etc".By the way, where are y'all getting this info, like WW's writing style, from? The Patreon?
His level of effort? That's mostly extrapolated from various info from his various weekly streams. Specifically the one last Saturday was about his "update schedule" and gave us a geneal peak on what his hours/work look like between an update. Combine that with the lack of "variable based choices that persist throughout the game" and it would have to be a shift from how he has written previous updates to write one that would play such a variable heavy role. WW has said his game doesn't have "real romance routes" or "non harem" stuff because he "can't be assed to write that".
How many variables has WW had that presisted across updates? (Like the ella/cole ones would need too) I can only think of stuff like "naming your special attack the ultra mega whatever of doom" and that could be from within the same update idk
Another thing that lessens the chance of a doll variable is that basically every relationship in hero (that you can get points with) is only viewable using mods despite having a relationships tab in the menu. WW is a muuuch better writer/artist than a Dev imo