The combo piece itself generating mana is a functionality that always had the regular advantage of spammability anyway, something that perhaps warranted the banning of Monstrous Rage even further
While he doesnt see a lot of play at the highest of competitive scenes like the Disney Lorcana Challenge(s) or other regional tournaments, Baymax sees a lot of play in local tournaments held by a Friendly Local Game Store (FLGs)
Despite the fact that the card needs to live a turn to actually deal a massive chunk to an opponent, I still think the upside is worth exploring and the card is an undeniable combo with Saheeli Rai, as eight Energy is the precise number needed for Saheeli Rais -2 copy to deal the immediate damage to an opponent
The card has become a staple in Hammer Time, but hasnt seen too much play outside of that, other than in some fringe Blue-White Affinity decks and some Thopter Foundry builds
Also, whenever an Elemental under your control dies, you get to deal three damage to any target
Im confident in saying its an overall positive change and I hope you think so too