That pacing lol looks like Hiroyuki really might be planning on ending the series for sure soon possibly, or at the very least, tie up Hoshizaki's entire subplot, but considering she's literally the last semi-MC-tier character left with an unresolved character arc and the only one out of the four main girls that isn't part of the harem, it's literally the only conflict we have left in terms of long-term arcs.
So regardless of whether or not she gets rejected and FO's, or she finally relents and tries to get into the harem and has to appeal to them or gain their approval (which tbf could be a new extension arc all on its own afterwards, but then again Hiroyuki ain't Miyajima Reiji, and this ain't KanoKari lol) and gets accepted either after Naoya rejects her offer to be the only girlfriend, unless we get an entirely brand new story arc with new characters and conflicts, this feels like a final arc tier closing lol
For real though, man's got three girlfriends with all three girls being 100% all-in on their harem, with Saki even being female-Naoya, since she's got just as much thirst and time left in horny jail for Nagisa and Shino. Who the hell would give up an entirely better deal where he lives with a completely consented to harem with three girlfriends lmfao