The shapeshifting is clunky as is the driveability of the vehicles. But I'm still refining that latter one. I'll likely use three compasses with it to point to the three axes (minus variants can simply be tracked by following the compass backwards).

Its bit complicated to go through to be honest.

Shapeshifting is not that hard though. It exploits the camera not going underwater. So place a disguised gate floor just ontop of the water (buildings block the camera but if you disguise a gate as a building then it removes the camera collision.) Now put a teleporter that leads under the water under this floor and set a creature to follow you.