Let’s face it, the map designs for anything other than Overworld (excluding certain Nahantu Areas which are designed more like dungeons) and clunky from a Mobility Skill viewpoint. It’s all Dungeons, Tunnels, Tight Corridors, areas that become translucent with the intent of increasing your visibility but actually end up blocking it, some angles are awkward, etc. It is very difficult to be Teleporting or Leaping along and be 100% precise. Even with a Mouse and Keyboard this is a constant struggle and annoyance, and seems to diminish the "flow’. I can only imagine how much more difficult it is for a Controller Player.
So my suggestion comes from how the original Diablo II and Diablo II LOD handled this, before new Blizzard took over Diablo II Resurrected and started changing a bunch of things that were not broken.
Originally if you would click to Teleport, Leap, Charge but clicked an area you couldn’t go, you would still Teleport, Leap, Charge, etc in that general direction/location to the nearest point you actually could go. This helped with the smoothness of gameplay, the mobility feel.
Whereas currently you just cast the Mobility Skill in place where you’re standing.
I wanted to suggest the same or something similar for Diablo IV.