I am actually very happy with the mentors of DID L'il Masters.
Dharmesh is a dance teacher himself so he definately is qualified for the panel. Also, he's a brilliant choreographer. The only downside to him is that on the panel of mentors, he's the least versatile and I'm not quite sure if he can choreograph dances not related to hip-hop or bollywood.
Amrita is also a dance teacher, so she's also very qualified for the role of a mentor.
Jai has his own dance institute and has experience teaching kids.
Mayuresh-Vrushali: I think many of the TLDC dancers are actually teachers at TLDA so Mayuresh should also have experience with teaching...Vrushali I don't know about--but she's a fantastic dancer and Mayuresh-Vrushali jodi is a lethal combination of contemporary + classical...
Other than that, peace.786 said everything I wanted to :)
And as per the first list of mentors, noone from season 2 was supposed to be a mentor..it was originally: Jai, Mayuresh, Vrushali, Siddesh, Paulson...but Siddesh signed ZND and Paulson got replaced...