While I enjoy the manga club I really wish that plotline would have just been Tasaki's thing. The idea of Kikuka making romance fiction about her brother is just weird and creepy and it's made any chapter about her and the other first years into meta humor which was already Tasaki and Tsukishima's thing. It's also kind of made Ririku irrelevant because she doesn't really fit into it and isn't connected to it beyond being Kikuka's friend which means she's just filling the same role that Poe filled when it would come up in the first year.
It's just kind of made a whole mess of characters redundant and absorbed ones who had more interesting things going on. Seta could have been fine as Kikuka's friend and Tasaki's kouhai/protege without Kikuka being in the club too. And then there's Kei who is maybe the weakest character overall. I guess we needed the obligatory "younger girl crushing on the male lead despite it being hopeless" character as part of the series' overall using/satirizing of romcom cliches but characters like that really never work.