In reply to Only a hill:
La sportiva Rock Jock
5.10 Ascent (replaced by the new Vertical Mile)
Scarpa Marathon
Mad Rock Frenzy
Red Chili Spirit Impact Zone (2007)
They all have treads moulded into heel for what you said. However all of them cost more than average. I assume it's just more expensive and complicated to put a thicker heel (which often comes with mid-sole).
Personally for long descents (off multi-pitches) I'll just carry a pair of light trainers, party to keep mud off my climbing shoes. For short descents I wouldn't bother and the lack of grip doesn't worry me too much.