The actual descent gradient is not that steep. 1500fpm sounds like a lot until you realize that the plane was doing ~220kts in the descent if memory serves. From a descent gradient standpoint, that's about the same as doing a 750fpm descent in a 110kt 172, and nobody bats an eye about doing that. This is also why commercial jets drop at 3000fpm from cruise and you don't hear screams of terror from inside. The deck angle and descent gradient are pretty shallow.
Synthetic Vision on ForeFlight definitely helped me with the arrival there and I was happy with how it went. Once I cleared the obstacle, I came down like an absolute brick, but at no time did it feel uncomfortable or out of control. Notice the control inputs are smooth and calculated. I know what altitude I'm shooting for, and I'm acutely aware of bank angles, pitch angles and the rate at which I'm gaining or losing speed in the descent. If I can stay higher for longer and then safely ditch the altitude at the end, I'll take that any day of the week for night flights.
If I compared the risk of the Grand Canyon crossing at dusk vs the profile I flew into HND, I'd say the former had some risk associated with it, the latter barely moved the needle, at least for me. Bear in mind, I'm extremely comfortable with that airplane and am absolutely used to seeing the VSI pegged in either direction
