WowAce

I wasn't sure if you knew this or not, but Blizzard stopped adjusting the position of the HotKey text in the ActionButton_UpdateHotkeys function. Here's the snippet from the relevant function in ActionButton.lua:

    if ( text == "" ) then
        hotkey:SetText(RANGE_INDICATOR);
        hotkey:Hide();
    else
        hotkey:SetText(text);
        hotkey:Show();
    end

 In LibActionButton, however, that method is still being called:

	if not key or key == "" or self.config.hideElements.hotkey then
		self.HotKey:SetText(RANGE_INDICATOR)
		self.HotKey:SetPoint("TOPLEFT", self, "TOPLEFT", 1, - 2)
		self.HotKey:Hide()
	else
		self.HotKey:SetText(key)
		self.HotKey:SetPoint("TOPLEFT", self, "TOPLEFT", - 2, - 2)
		self.HotKey:Show()
	end

 The problem is that this overwrites Masque's placement of the HotKey region. In the previous version of Masque, I overwrote the SetPoint method of the region but this is bad practice and could potential cause taint so I removed it since Blizzard wasn't using it. I'm not sure if this is something you'd want to address in LAB or if I need to secure-hook the HotKey to make sure Masque can counter it. Figured I'd ask first before I put something in that I'll have to remove later (though I may have to do that anyhow :p).

Actually, looking at the code the SetPoint doesn't even need to be called in the UpdateHotkeys function as it's only visible in one position and that position can be set in the CreateButton method. I think this is why Blizzard removed it.

Without SetPoint @L1312

function UpdateHotkeys(self)
	local key = self:GetHotkey()
	if not key or key == "" or self.config.hideElements.hotkey then
		self.HotKey:SetText(RANGE_INDICATOR)
		self.HotKey:Hide()
	else
		self.HotKey:SetText(key)
		self.HotKey:Show()
	end
end

Or check for Masque first:

function UpdateHotkeys(self)
	local key = self:GetHotkey()
	if not key or key == "" or self.config.hideElements.hotkey then
		self.HotKey:SetText(RANGE_INDICATOR)
		if not self.MasqueSkinned then
			self.HotKey:SetPoint("TOPLEFT", self, "TOPLEFT", 1, - 2)
		end
		self.HotKey:Hide()
	else
		self.HotKey:SetText(key)
		if not self.MasqueSkinned then
			self.HotKey:SetPoint("TOPLEFT", self, "TOPLEFT", - 2, - 2)
		end
		self.HotKey:Show()
	end
end