I know I might be in the minority here, but I actually don't mind them cutting down the number of members (Amatsuka Moe was an exception though, I wanted her to stay). The show has trouble finding time for all the members and over half of them aren't doing anything at any given moment anyways. I wouldn't mind them reducing the size down to about 20 and give each girl more time to show themselves.
I think the bigger problem with the show is the unnecessary push given to the Asagaya shimai. The last time I checked, the show is called Muscat Night, not Asagaya night and the group is Ebisu Muscats, not Asagaya shimai. I don't get why the staff give them so much time on the show and they aren't even all that funny. The latest episode was a great example, why spend half of the show on Asagaya shimai? The MV was such a waste of money and resource, instead of spending money on making a MV that no one really wants to see, why not spend it on improving the quality of other MV or use it on a field trip or something. Maybe if the show actually spend more time on the girls, not so many of them would want to leave. They must also consider the audience, I doubt anyone really stay up late at night to watch Miho kiss like a hundred times on screen, I know I definitely didn't sign up for it. I see a lot of complains from Japanese fans about the MV and the amount of time Asagaya shimai gets, maybe it is time the staff actually listen to the fans for once.