^^ Agreed.
Maipuru (and most of Idoling!!!'s over 20s club) already reach her mature women "voice", which mean she doesn't really suit for typical "idol" songs (high pitched voices, or "noisy girl" voice
). IMO Maipuru (and the rest of 1st-gen) should try more smaller group (between Idoling!!! members) or even solo career just like her 1st solo concert.
Btw between rest of 1st-gen member, each one have different voice characterization.
Maipuru = Soft & melodic, not have much power => pretty much like Mai Kuraki
Ruri = high pitched & deep with so much power => maybe like Ayumi Hamasaki with different type
Ton-chan = typical japanese women singer, not so much power also => pretty much like Kana Nishino