You hit the nail on the head with your rogue analysis! That hero is currently a bit broken because they have so much free damage potential, worst offender being quick attack weapons. The power level alone would be fixable, but the main problem I see is that it completely sidetracks the whole armor concept... because if you're never hit, why ever get armor? And that's making the playstyle too one-dimensional, IMO.
My current plan is to reduce the amount of quick attack weapons, first and foremost the daggers. Having all daggers have quick attack was cool for differentiation to other sets of weapons, but quick attack is just too powerful of a mechanic. I still want players to get a taste of that power and build decks around quick attack, but it should be more focussed and not as easily available.
Thank you so much for your ongoing playtests and your feedback, it means a lot to me! :)