Control arm / FCAB questions

After recently doing an oil change I had my car in the air and noticed I could grab the front drivers side wheel and was able to wiggle it a little bit. Obviously there shouldn't be this much play in the wheel and started to think that it was because of my FCAB's needing replaced.

In my searching I found myself asking if I needed to replace just the bushing or the actual control arm as well? I'm assuming it would be smart to do both sides at once?

I found these and will probably buy them since the vibration I get in my steering wheel (only when turning to the right at high speeds) is getting bad enough that I need to address it. Any knowledge or help is greatly appreciated. Hopefully I covered everything enough but if not I can fill in the blanks if need be.