Wheel drag isn't a great indicator of caliper function. To assess the calipers, remove the pins and pull the pads out. Then use a piece of some kind of flat stock (old pads work well) and a c-clamp to push the pistons back into their bores. They should retract smoothly and without a great deal of force. Inspect for leakage of brake fluid, and for tears in the rubber dust seals. The only other reason to replace a caliper that comes to mind is a broken bleeder screw that you can't get out.

I've had good calipers with dragging brakes because the pads or hardware were jammed up or corroded. When you remove them, clean them up and clean up the sliding surfaces and lubricate sparingly with silicone grease (keep it off the pads).

Sounds like the more pressing problem is the looseness in the front end you are describing. Don't drive the car till you sort that out.

Good luck!