As far as my experience goes with current version. Hex now also disables triggered passives such as Axe's Counter Helix, Faceless Void's Backtrack, and Bristleback's armor (both damage reductions when attacked from side/behind and counter spike), Reactive armor, etc etc etc.
It also disables Abaddon's ultimate auto-trigger, Delays Riki permanent invisibility (the timer still running, but if Hex not expired when the passive timer done, riki wont turn invis, after Hex expired, riki will immediateally vanish with 0.5 sec' fade) and the likes.
It still does not disables WK resurrect as usual. Does not remove activated Doom's burning aura, toggled ON Leshrac ulti (although he can not disables it off), spectre still able to free-move in hex form, broodmother will be invised if hexed on her web. Tell me if I wrong or not?? 18.104.22.168 14:36, 25 April 2015 (UTC)
Does it still disable item-based evasion/damage block? 22.214.171.124 09:05, 17 May 2015 (UTC)