There's not near enough space where you mentioned it. It would also take a lot more demolition considering the lockers and rider switch rooms are indoors.
If there's any place they can/would put a new spinner, it's in the underused JP extended queue where they normally put a HHN maze.
Here's a mock up of how I'd have it. Note that the new spinner is about the same size or tad smaller than the Super Silly Spinner, which you can also see in the picture.
Space is tight, but not impossible:
Red: path towards spinner & queue
Yellow: exit path
Lime and green: snack/drink & merchandise stand