There's been a lot of debate about that nose cap. Back around 2006 the on-orbit crew Dragon concept art looked like this -
they moved the panels to the trunk and made them larger, 5 kWh, and lost the nose cap for simplicity on cargo Dragon.
A pretty good case for its return is being made by engineers who feel it could serve as a re-entry protective device for crew Dragon's very
expensive new NDS (NASA Docking System) docking adapter, which would facilitate its re-use.
NDS will be used on all Commercial Crew spacecraft and NASA's Orion. 2 NDS port adapters will be shipped to ISS by Dragon so spacewalks can do the mods to the Harmony module. This will allow docking 2 crew spacecraft simultaneously.
My question is what would happen in the case of a total or partial failed deployment?