Very poor turning return-ability is a major sign of worn strut mounts. For example, when you are turning, normally the wheels with steering wheel want to straighten itself out. When you make that same turn, and you lighten up the grip on steering wheel and the car does not straighten out, but continues to keep turning, then the upper strut mounts are worn. Inside the mounts is a little bearing that rotates with the struts while turning. Also noise can be accompanied with worn mounts. Hope this helps out diagnosing.