Now that the patch has officially gone through and I've been able to confirm the results I wanted to add some more information. My range is less than half what it used to be, and I'm hitting about 55% less. Its so bad that despite being lvl 242, 10* tyrants, 3l m.att absolab fan for my Haku, maxed out nodes and 540 arcane power I don't always 1 shot Arcana mobs with drop gear on (all of which gives at least one line of int still). Nexon can't seriously expect anyone to enjoy playing this class in its current state, and it's definitely not "more competitive" with the other mages now.
Just wanted to add the voice of another Kanna main that feels a bit betrayed (and confused) by this change. I've put thousands of hours into Reboot (Lvl 242, all 3l gear, halfway to my arcane weapon, etc.) into a class that was never particularly strong in the first place, just because I enjoyed it. The most recent buff finally made Kanna's competitive and now to hear that such a short time after they'll become WORSE than they ever were initially is just incredibly depressing. The suggestion of making Haku a self buff again is the only one that makes sense in term of balancing and I'm sorry to see that that was not the one that Nexon followed. I'd add that I hope they'll see the horrid spot Kannas will be left in afterwards and adjust accordingly, but that feels like wishful thinking.