^Not really, I believe her voice isn't suited for the current electro-pop MM is doing. I listened to her version of Wktk Take a chance, and while her singing was great (as always), it felt a little out of place (maybe the instrumental played a part of that as well), hence, wasn't as enjoyable as the original.
Anyway, her deep, powerful voice would sound a bit strange in songs like 1.2.3, Help Me, etc. After all, Tsunku writes the song with the singers in mind, not everybody can sound the best in all kinds of songs...
Also, I agree that Aichan was a legend... I'm a huge Aichan fan myself, took a while to change my Aichan Ava...
But things change, everybody moves on, and I'm supporting the current MM because they deserve it, with or without my lovely Aichan