The frequency of the slider puzzles on elite clue scrolls needs to be reduced. Doing elite clues and having to do 5-6 slider puzzles is not fun in the slightest, it is extremely tedious.
Elite Scrolls just need a greater variety in general - I just got something like ten Celtic Knot puzzles in a row.
This is why I have so many Elite Scrolls in my bank - the constant repetition of the same puzzles over and over is tedious and the subpar rewards compared to other tiers of Clue Scrolls doesn't make them worth the tedium.