personally i dont think that'll be a good idea. el luchador's stance is more unique than other stances, so re using it would be kinda redundant. lucha libre's stance has been used twice already, but i feel that its nicer to look at.
it does seem over powered but if that were the case then the ground hit would be useless. if you just did Kg and not the grapple afterwards, the recovery time is so slow that it makes the ground hit useless unless you're playing teams, this is because in 1v1's you wont be able to do infinites with the ground hit. but it does allow for a nanmu to be used after a juggle is finished, which is OP. and look at recent scrolls: Marang has the Exo move with the wolves, Choy has that op stun, red storm got that crazy back grab. every scroll has that one op move that makes people say "ehhh". the ground hit was supposed to be OP and unique, as we haven't seen a scroll with a move that hits grounded opponents in the air.