Momochi played AMAZINGLY with Ken. He out-footsied and even out-fireballed Daigo's Ryu thanks to the constant threat of U2. He almost made the matchup look like 5.5 / 4.5 in Ken's favor, but only if you have the reactions that Momochi has to make U2 a threat.
Ken will be high tier for sure in Ultra if he keeps the buffs he's been given.