Honestly I like watching both. Jack is obviously beast and needs no defense. But in Jeff's defense I can only take so much dylanesque flow. Sometimes it's good to see someone in their own lane pushing boundaries. No one else is doing flips like that down 10+ stair counts. He is opening the door for it tho, maybe in a few years some other skaters will catch up to him and clean it up a bit. Todd falcon did his shit in a garage mini ramp, Jeff is doing his shit in the streets. His part for grizzly was pretty good.
I totally understand the hate comments cuz his arms are awkward and he barely pops. Honestly I think if he spent a few months just popping flat ground trick while going really fast and a couple months learning transition to get flow, he could really shake things up.