You would want to avoid crashing with a race car in real life, just as much you would want to avoiding failing with no parachute in a race scheme. You can still rope as fast as you did before, but if you mess up, your turn will end. With Ldet, you will be able to keep going, and sometime with full speed regardless if you failed a few times during a turn. And to be honest, it is refreshing with ldet. it makes you less on edge, and more focused on the speed.
LDET was thought about for ZaR RR, because some thought ZaR RR was too unforgiving. So I opted to enable bounce with minimum bounciness and it did make it much more interesting. Interesting how exactly? Well, with bounce enabled, ''to fail'' was absent, and this would often leave the less skilled people behind because they didn't have the speed necessary to keep up. It gave the less skilled barely any chance. So I just don't pick this option often. It is good for warm up and practice for less experienced players.
But this is my experience, and may not reflect your reality.
So which is better for league and newbies? LDET? Bounce? Keep it as it is? Hmm, I would say that the league could be more inviting for people who are looking to get into it. Race schemes might look less intimidating for them, since it could help them Improve. But on the other hand, if constant motion in race scheme is not a priority, people would have to deal with failing more often(With Parachute, obviously). This could turn some people off.