I used a healing potion for throwing once and never again. To me it seems silly and cheap, and not very immersive. Even if a potion is magic in DnD, it seemingly is magic mainly to be drunk and working from inside the body. For me the throwing is like taking the needle from a syringe filled with antibiotics to battle an bacterial inflammation and squirt the fluid into the face of the patient. Not very effective, to put it mildly.
At least they should add some random side effects to the thrown potion, like bleeding from splinters, or temporary or permanent blinding from an eye hit.
