So to help out here, I have found that the Poly-morphs Talent Bull horns, which gives you Bull Rush can be a bit annoying and forces me to have to constantly adjust my action bar.
The why of it: Bull Rush only shows when you have bull horns and will only fill an empty action bar slot, then it goes away. If you pick up any items that add to the bar, they will fill the slot you clear and you have to re-arrange your bar again and again.
The fix for it: Have the Bull Horns Icon "become" The Bull Rush Icon. This way you don't have to have an open slot and no longer have to re-arrange your action bars every time you find new items.
If there are any other class abilities like this, it is my professional suggestion those also apply this idea, I know its a bit late in the development to have this suggestion, but hopefully you have already done this or can easily add it, test it and be ready for a much anticipated smooth release.
