Sasuke couldn't keep up with Bee's reaction timing with his MS and 3T perception, without any Biju influence, all Bee. And Bee would also be on Naruto Kurama cloak, which makes him that much more dangerous..the only people who dodged enton arrow are kakashi(sharingan pre cog but still too fast, had to warp it) danzo(too fast had to change its direction) and kabuto( sage mode danger sensing)
killer be doesn't have these options and he can get picked off before he gets the cloak.
You're underrating Bee, I'm sure he could dodge Enton.