Ah I forgot about this thread.
My profile still works https://supermariomakerbookmark.nintendo.net/profile/SvennoJ
I should fire it up again some time and probably hate myself for not being able to complete my own courses anymore :) Damn those completion percentages. Strangely my hardest course (0.74%) got the most plays 1342. All my puzzle levels seem too hard, too long, or too boring :) Root memorization of patterns in fast levels seems to be the most popular. Or it's simply that you can do 20 attempts at those vs 1 attempt at figuring out a puzzle.
I doubt they ever 'fixed' things de-activating / resetting off-screen. That was my main problem for creating more puzzles, as well as timing sequences correctly as elements activate based on your position instead of having a way to time or link them together. 'Fixing' that would likely break levels that use the reset glitch as a puzzle mechanic, so I assume the base mechanics are still the same.