I personally found the "half" to take up too much of my unit frames so have editted the lua manually:

Adding , 0, -10) to the second SetPoint.

elseif highlightType == "gradient-half" then
-- self.highlight:SetParent(self.parent.widgets.indicatorFrame)
self.highlight:ClearAllPoints()
self.highlight:SetPoint("BOTTOMLEFT", self.parent.widgets.healthBar)
self.highlight:SetPoint("TOPRIGHT", self.parent.widgets.healthBar, "RIGHT", 0, -10)
self.highlight:SetTexture(Cell.vars.whiteTexture)
self.highlight:SetDrawLayer("ARTWORK", 0)

Could we have a slider for this option to allow users to change this in the settings?