I just run the event challenge and I must say it reminded me on the first secret level in hexen. It was a level with 0 enemies, zero challenge and full of health potions and treasure. It took a lot of work to open it but it was totally optional.
I do not mind having a zero challenge event especially since it's the xmas event basically.
I don't understand why we're basically using the mabar distribution of motes/keys with the added slowdown of opening a chest but I'm guessing it was thought that it would feel nice for people to open chests? From the three systems, epic old token fragment drops, collectable drops, remnant drops, this is probably the worst but meh.
edit: I may not have been clear enough, I like the event! I am terrible at mario but this is easy even for me. Not once in my life did I ever succeed at the risia jump, only the parkour find the spot. But I am one of those lucky ones that looked at my bag and had like 50-60 keys randomly.