I don't understand the rebuild previews

Here’s the preview:

And here’s the result:


What did the preview, with its multitudes of dots (seemingly none of which corresponded to the actual result), try to tell me?

Hello - the preview points show a sampling of deviation from the input. Red is the farthest.



But since it’s already difficult to know which direction is U and which is V, wouldn’t it be better to show a preview of the actual rebuilt control point layout?

Right now, I always have to guess at a control point distribution, press OK, then undo and try again.

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