Their second XI is better than ours tbh and while far from certain I would say they would have a significantly better chance of beating Leicester in that game.
I mean if the first team is Ederson, Walker, Stones, Dias, Cancelo, Rodri, Gundogan, KDB, Mahrez, Foden, Silva their second is something like:
Steffen
Garcia
Ake
Laporte
Mendy
Fernandinho
Zinchenko
Torres
Sterling
Aguero
Jesus
Hell of a forward line anyway and a decent defence. Throw in a first team midfielder for the 10 changes and that's a strong lineup.