The magnetizer main purpose is to serve as an elevator, thats good, however its unflexibility is a problem.
I propose a change:
Add upgrade slots (5 slots)
There will be 3 upgrade slots for overclockers, the first increases max poles that are magnetized, the second increases the area of effect and the third increases the strength of the magnetic field (upwards speed). All of these will increase power draw, of course.
Add supermagnetic upgrade which allows anything to be magnetized upwards, no need for metallic boots or whatever anymore. Increases power consumption by a factor of 5.
Allow magnetizer to magnetize connected iron fences on all 6 sides, instead of only up and down (thus you can have one magnetizer powering 4 different poles and allow magnetizer chains).
Edit: Add button in the GUI to change magnetization axis, so you can have horizontal magnetizations, allowing superspeed pathways, good for mobgrinders for example.