After playing my Candy Barbarian, and getting it geared up for end game content, I wanted to suggest a few minor tweaks. Overall I feel like the Candy Barbarian is in a pretty good place, but could use the following:
1. Remove knockback from Vanilla Swirlwind (in general, a melee class doesn't want to knock enemies back, since in knocks them out of melee range/off ledges/etc.)
2. Negate incoming knocks from enemies while performing Sugar Crash/Scoop 'n' Gloop. Since you have very little ability to control the actual movement of the leap once in the air, enemy knocks often knock you in unexpected directions (even tested with stacked Stability, but it doesn't appear that Stability affects knocks while not on the ground). This is more a problem for Scoop 'n' Gloop, since it pulls enemies closer and generally causes more incoming hits. Something similar to the knock immunity Revenant gets while Spirit Spears is active would be great (maybe 1.5 seconds of knock immunity once the leap actually begins -- not while 1 is being held).
Otherwise, the Candy Barbarian seems to play very well in my opinion.