I don't mind rivals and rival plots at all, but Mai (even though I felt a little bad for her until the end of this arc) is just kind of boring, so reading these chapters slowly over weeks would've killed me. Thank the yuri gods (aka Yuri Project) these chapters were released all at once.
Also, manager is pretty cute, I hope she's actually into Mai, so they can have their own thing and be happy together (sort that out in the background though lol). And Nanoha and Chidori are, of course, always extremely cute together, even if we didn't get much of that here.