Bubba is immune to BT
Not sure if this is intended and if it was a thing before. But Bubba can insta return to the basement and then BT isn't working anymore. He can rev the chainsaw, catch you at the stairs and bodyblock until the chainsaw is ready, hit you with the first swing. While walking backwards after the first swing, you have to run through him, and with the second swing, his chainsaw movement speed is fast enough to down you. So there is no chance to escape the basement against new Bubba.
Another thing: With the green increased movement speed, it is not even necessary to bodyblock and force the survivor to clip through the killer, movement speed is high enough to catch up the sprint boost after the first hit, downing the BT'ed survivor with the first and third swing