In my opinion, a new Muscats program could work.
I don't know, but I don't think the majority of people in Japan are open minded enough yet to accept bunch of AV actresses on prime time TV, there were backlashes from people towards mechaike when Muscats appeared on it.
I also doubt any sponsor will openly associate themselves with AV actresses unfortunately.
It could be just me, but if they cut the number of Muscats members down to 6 or 7, then it is not them anymore. To me, it won't feel like the Ebisu Muscats that we know and love.
If they are going with bunch of new members and new host, might as well start a brand new show with a different name.
Let the group Ebisu Muscats and the show forever be remembered as a legend, just like some movie you wished that a sequel was never made to tarnish the original image.
As to the members that I would like to see for a new show:
1- Yuma (energetic, powerful and a good singer)
2- Kaho (best natural comedian in the group)
3- Aino (has her own show Aino Etude and has lots of experience)
4- Airi Nagasaku (best singer and dancer in the group)
5- Rin (has her own show alongside Jessica, works well with Kaho and Aino)
6- Jessica (she could possibly become a co-host? and same reason as Rin)
7- Shou (her heckling was fun)
would have loved to keep Yuria and Acky but there is just no more room
new members:
8- Sakura Mana (popular and has her own show along with Kojima Minami)
9- Kojima Minami (same as Mana)
10- Namiki Yu (singer and songwriter)
add one or two gravure idol that are on the rise
this is just my two cents