Awesome stuff! Its also worth noting you can beat out WR 4K P with an attack up to 15 frames and get a strike punish on Ryu after parrying WR 4K K, Jann Lee for example can do a 6K for a guaranteed launch after his special Dragon Counter.
In this video I will show you how to deal with Hayabusa's WR 4K and its optional follow-ups. Have any questions? Feel free to ask them in the comment section!