The main reason why Shota got booed so much is because he imposed himself to get title shots when he just need to wait.
After the opener and the fight with Ishii, it was clear they would do a program where Shota and Yuya fight Taichi and Ishii, with singles previews and a final tag match. And the winner of that match would legitimate themself the title shot.
If they dont invade after the main event, the booking would be exactly the same and the crowd would not boo Umino and Uemura.
Now they are the bad guys of the story.
by Mandraker17