Return of Reckoning

I know that there is no chance for quick changes in 2h choppa/slayer spec. The middle path needs a lot of interference to make it playable.
Maybe start with simple things to finally make the 2h ST spec playable.
I suggest changing the 2h fortress weapon bonus.
Replace the current one for 9% chance on hit with an increase of 9% crit chance and 12% crit dmg.
A small change but maybe it would at least increase the 2h potency a bit.
The current state of affairs is abysmal.
99% of people only use dual wield for aoe and ST spec.

I agree very strongly with you.

My suggestion would be: change holding grudges (pent up rage for choppa?) into Path of the Giantslayer (choppa too) exhaust blows to not take rage away.

Very good idea.
It would increase ST dmg compared to dual aoe spec.
There would be an opportunity to drop rage with an ability from another mastery tree.
Only it would involve the loss of a tactic slot which would cause a drop in dmg.
A better version of your proposal would be a general rule that mid-track abilities do not drop rage.
After such a treatment we would surely eventually see 2h choppas/slayers.