I’ve only casually leveled but there’s three things that were giving me a nagging feeling.

Twin snakes and Demolish feel like they’re falling off a lot more compared to ShB. I don’t know if it’s just me being crazy or misremembering but it feels like I’m dropping those two effects a lot more in End compared to Shb. Maybe increase the timer on twin snakes my an extra second or two, demolish is harder to say though because of server ticks and buffs affecting it though.
HW leveling was stripped completely bare. You get Forbidden chakra at level 52 and your blitzes at level 60, one of these is just an upgrade to a preexisting skill so in practice you get one new button. There should be something else added at this level to help make it more interesting, and personally I think they should add in Fist of Fire/Wind/Earth and make them into weaker versions of the riddles. Like Fist of fire into a 5% damage buff, Wind into an auto attack delay of 30%, and Earth into a single stack version of riddle of earth.
Finally the Chakra system should be expanded to hold more chakra. It’s the only job that doesn’t have any leeway in its use like other gauges like the Kenki gauge, Heat gauge or shroud gauge. Just make it hold 7 chakra and keep Forbidden chakra at a cost of 5 would do wonders and be more lore accurate to.