I would be surprised if the tyre wear was due to bushings if you don't notice any metal to metal sounds over uneven surface or potholes. Yes they do wear but to get to a state that your toe angle has changed significantly for tyres to be bald on the inner side I believe its noticeable in sound and feel through the car. Toe angle adjustment has a big par to play in worn out tyres, often more than bushings and camber.
Definitely get the tracking checked, if its way out, expect the steering to feel lethargic after you get it done as I imagine that if the toe is out and adjusted back into line you steering will feel strange.