Minor note that I think belongs here just now:
For a few reasons (one of them demonstrated here), I've decided to change Archipelago's settings so that you don't have to have CaravelNet-based proof of exploration in order to see the rooms online. This means you can now use the "
Insert DROD Room image"
feature*, among other things.
From my perspective, the point of the size of the door system around the orb in question is that
Click here to view the secret text
×you have to be able to move in all eight directions without releasing the pressure plate. More than anything else, this extent is a safeguard against any solution besides the intended one mentioned by TFMurphy. Even so, it took a long time to work out the unintended solutions surrounding even just that one part of the room.
*In spite of single-room levels
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Penwielder's Palace,
Detention Complex,
Archipelago,
Cube of Memories