I think you're doing great with everyone! Even if some people have been less present than usual, you've still been really active and involved with everyone. I really enjoyed all the various things your characters did for the last event, Hokuto in particular was really amusing, and I liked the way you kept her sounding IC and being her usual crazy self, even though her circumstances were so different.
Since you asked about Sakura and Fuuma especifically: I love all the CR Sakura's built, and the balance between his more serious and sillier sides. Considering how little we know about him so far, you're doing a great job. It doesn't feel like he's two-dimensional at all, and the little quirks and headcanons you've incorporated into his playing fit him so well. With Fuuma, I like the way he's kept open to CR despite the recent developments with Kamui (and Subaru, and Seishirou). He could very easily completely shut off, and it'd be justified, but you've managed to make it so more people can get to know him and bond with him even through all of that. I haven't noticed anything off with his voice or overall characterization, either, he seems as good as always.