i rather have the feeling werra will use her on mi-solo since thats one of the positions where there is not a star who cemented her position so the quiet mayindombe despite his 15 years in the group will surely surrender that position like he had to do with mogratana,japonais and co
arc en ciel is one of the chefs now if i am not mistaken so he will have an advantage
Basically, she is already a star and the response of the fans at La Samba shows it all, they would want her to be on lead not mi-solo. Have you realised that Arc en ciel has never gathered the courage to go on stage and replicate Kapaya's licks but she went there on stage played note for note without any error, look at how shocked and extremely excited Werra looked when she did that.
Knowing Werra, he would want to capitalise on the fact that she is a woman to cause some buzz and gain popularity from that so having her on mi-solo won't help him much.
Werra simply had no confidence in Ya Mogra and Japonais when it comes to the sound and style he Werra prefers which is Kapaya's. That is also the reason why Christian Bombole and Luxembourg went straight to lead too,they play exactly like Kapaya.