The changes to Hurricane and caster druid in general were really awesome. There are some issues with Hurricane though that make it not nearly as comfortable to play as it should be.
For one, there is a delay between the animation hitting and the damage being dealt. It happened to me multiple times that I was killed and then all the monsters around me died. To give some proof, here is a video:
https://streamable.com/52tqghNote how the damage only applies to enemies in melee range after I started running away. Whereas the missile animation is already long gone. That video was taken in Single player. So no, there shouldn't be a serverside delay.
This makes the skill far less good than it should be for several reasons. 1) You need to count in the delay and attack when you shouldn't yet need to attack. 2) Smaller mistakes (in the matter of 0,5 seconds or less) aren't forgiven at all. It might just so happen that you still die where you should've survived because in that time frame, you should've dealt enough damage to deal with the enemies. 3) You get stuck in hit recovery animation when the monster should already be dead, which is of course the main issue with channeling skills. 4) This forces the player to go all out on vitality in order to survive.
Also, I don't think I've ever noticed anything similar to that when it comes to SMG sin. Sure, SMG takes longer since it doesn't travel as fast, but enemies in melee range were hit instantly after the charging started, if I remember correctly. (seriously, correct me on this part if I'm wrong)
Issue number 2 is in regards to the occasional knockback. It feels so random and unintuitive to kick enemies out of your range at seemingly the worst moments. I don't see why there should be any reason to knockback enemies at all. Especially if you play with Harvesters (which you need to do because of issue number 1) you have to reposition yourself far more often than you should have to, since they block enemies from running to you again after they were knocked back.
Rarely, I also had another issue: The skill was interrupted as soon as the damage should've come. You're then stuck in trying to use the skill -->being interrupted --> trying to use the skill --> being interrupted. And that without anything hitting you, or forcing you into hit recovery / block animation. This issue usually solved itself after about 5 seconds. But it can be annoying. It only happened twice to me in my playthrough.
Those 2 issues aside, I really love the skill. You actually notice how you get far less damage and how this makes it easier for the player not to be interrupted. And not focusing on energy at all, I still have some decent damage numbers for that level (118 so far)