I find it ironic that basically everyone hates the slide puzzles lol. That's one of the most straightforward rooms in the quest.
Straightforward, yes, but not necessarily the easiest. The slide puzzles are in the same kind of category as a Rubic's Cube. You either have to be able to plan out moves FAR in advance, or else learn and memorize the proper algorithms to solve the puzzle. If you do the latter, you can essentially solve any puzzle of the type. So the slide puzzle may be straightforward, but essentially requires that you learn and master an entire new type of puzzle, which is a far more complex process than, say, figuring out a hint for where to walk through a wall.