Is the art a little different or am I going crazy?
No, it isn't you, I noticed too.
And I would say it's not just the art, but these past chapters in general have felt... kinda off. Almost rushed, I would say.
Chigusa Minori is a machine, like, she pours a LOT of time into her love project, Shino and Ren, including illustrations (seriously, I wish she poured even half of all that into Suuna and Ruka), is also doing the art for the doujinshi
Girls × Vampire, and is a very active illustration artist, like, for example, this month she did the cover for a
Yuri NTR anthology, among other activities.
So all this could simply be her being overwhelmed by her workload, or she is simply looking to close this manga up because of that same workload.