I have seen this done on a few control arms including my own which I bought like that.

Why is the end loop cut like this? What does it offer?

Mine were cut like that to provide clearance for the aftermarket 28mm thick brake rotors

Ahhh yes my friend recently installed Z32 front brakes, and crysler front discs on full lock the discs rubbed against the control arm in that area. So it stands to reason this is a way to avoid that happening.

This is something else you can get to avoid this but i forgot the name of them there like step ups or something.

Excellent, thanks guys.