This pretty much support my point, when a company have the money for it they want to use their own code instead of licensing another. KI team brought the guy behind GGPO to help them write a netcode instead of just licensing GGPO, no way this would have been cheaper than licensing GGPO!
Price isn't the issue, neither is the language. Yatagarasu is made by like 3 Japanese guys(ex SNK/Capcom devs!) and they had no problem working with GGPO, you think Capcom/Namco(who already made a game with GGPO)/ASW avoid it due to language barrier? That's just ridiculous.
And using GGPO in the games IG made for Capcom still had to get approval from Capcom, so we know that they have nothing against using GGPO. GGPO success is probably the reason they're moving to roll back netcodes.