When I started hanging a couple years ago, I used a WB Yeti and a pad. Unfortunately, I suffer from both long leg syndrome and fidget-in-my-sleep syndrome. Even with triangle thingies to adjust the drop of the UQ and making adjustments to the pad, I still found myself getting frigidly cold feet mid-night during the fall months.
For me, the comfort of a full length UQ and, more importantly, the safety of it since I prefer to camp when it gets cooler made the difference. The weight difference to me is negligible. As far as the go to ground option, I have always been a firm believer of keeping your gear tip top and trusting in your gear. I've never been forced into a situation where going to the ground was a necessity though and I hope never to be.
I think it really comes down to what your safety tolerances are and what your trust in and knowledge of the limitations of your gear are.
Not all who wander are lost - J.R.R. Tolkein
Besides, if we get lost, we just pull in somewheres and ask directions - Captain Ron