I get what you mean. Definitely. But please remember the tools presented in place already to avoid loss of time through DF PUG. Preformed parties through your own friends, LS or FC or use of PF. These tools are in place to alleviate the issues that come with DF PUG. And if you must DF PUG just voice that people please give it a shot. Not everyone ragequits those trials (like myself) and some come into those trials purposely as a partial preformed party. I've gone into that trial to help clear it with a lot of people I know and I don't usually attempt to get a full party when I do it. It's usually 4-5 total (myself included) and yes, people ragequit out but the flow of those replacing them is quick and I just ask them to give it a go. That alone usually gets them to try at least one run and we usually clear it in that same run. If not, it's because someone missed the first dragonkiller and its obvious that had we got that shot it would've been a clear and those same people who almost ragequit will willingly stick through the second run.
There needs to be a bit more effort on everyone's part.
Though, admittedly, when you know the wipe is inevitable I do wish there was a 'accept defeat' option rather than wait the 10 minutes it takes for Visharp to break the walls before trying it again.
Edit
Though, the comment of a fresh 50 at either Chrysallis or Steps of Faith strikes me as odd. You would have been LV50 for quite some time before hitting either of those duties, especially when meeting the item level requirement. It takes someone to literally know exactly what they're doing to reach both of those trials and meet those item level requirements as soon as possible with touching as little of other content as humanly possible - which would mean they are far from a 'fresh' 50. Anyone coming into those trials will have a grasp of the games mechanics.