And current P2W Eidolons are at least 55% more Elemental attack than available otherwise. And if I understood right, you're basically comparing 0-star 100% Eidolons to MLB 120% Eidolons.
The 120% Eidolons will be buffed a bit, but you're really underselling just how powerful those are. Either will grant you the greatest thing that a new player can want - actually competent Friends.
In addition, the couple of months that a player would miss before rerolling into Hanuman would a huge loss as well.
tl;dr; The current P2W Eidolons are plenty good enough.