Hehe. The figure is actually added to please those who seek a challenge once in a while. Its a secret and its not necessary to complete the game. Basically, so you always have something to go for in the game.

Absolutely!  Because the rest of the game isn't challenging at all.  (/sarcasm)

I do find the frustration level of the Figure to be a bit much.  The Mini-Figure wasn't such a problem.  What truly vexes me about the Figure is that passing a challenge doesn't generally help.  If you fail at a challenge, you go back three challenges to the last save point, and get to repeat the obnoxiousness you'd already put behind you.

That said, the only purpose to the Figure is itself - there's no special areas accessible only from it that would be particularly nice to see except the Figure itself.  (/sarcasm)  Returning to the truth, there is something accessible only from the Figure that isn't the Figure itself, and that's the only reason I ever attempt the Figure.

There's actually a secret room in the game that shows the map of the disorder

This map is infinitely more useful, especially for noting where it links to realspace.  Good one on you, Riamu - I'm liking this.

Nice!  It's always entertaining to watch other people's playthroughs.

Although I always end up going "NO, DO THIS, I DIDN'T DO THAT AND I WANT TO SEE WHAT IT DOES!"

This is impossible.

Spoiler: I explain it here, but if you haven't yet played until chapter 3, don't read this! (click to show/hide)

At the end of chapter 2, you go into those pipes and then an accident happens. This accident makes you able to do this. As with all accidents, its a one time happening. Of course there are no studies about this phenomenon. For that reason, the game leaves this entirely in the middle, as it should do.

I may be an outlier, but I enjoy the cobbling approach to plot in KU.  It follows the way you often discover things in reality - bits and pieces, not always in order.  It also creates a very different kind of puzzle to solve, and due to my peculiarities the mental puzzle is much more of the game to me than the physical one.

I sincerely doubt Nifflas would put something so tempestuous, vast, and oblique as the Disorder without putting something there you can't get to but from there.  I mean something other than scenery, which obviously is there as well.

Then again...