A world record is physically impossible to get now thanks to the fact that the map is completely rearranged. We should probably have verison leaderboards (and also IL categories so people can run farm :))))))))
I agree with this for the current state of the game, but with the new portals update estimated to come out in the next 2 weeks, it will be possible for all runs to be optimized. For example the fastest possible time is in an older map, soon anybody can do that. Even after that update, I think there should be categories for full old map completion, full new map completion, and 100% run. I think the 5, 10, 25, and 50 quest runs should all stay the same though. I think the race should also be rearranged into new and old races, along with using the accurate mid-race timer instead of the broken end race timer.
edit: besides for the event and multi lap races, which are exclusive to old maps, the only quest world record that is stuck in old map is 85 no perk, as all the others are achievable on the new map.
Marble Mania just had a huge update which made it so there are now 300 quests and a huge new map called Fortress Falls. Old maps have apparently been improved and the old maps are still there! i will add fortress falls and elephant kingdom soon. In the races, we saw that now it is start/finish, not