I would imagine Coach could repair the turnlocks, but I'm not positive since it seems like everyone who had that problem so far has just gotten a replacement. I don't know if that's due to the fact that Coach can't repair it, or just that if a bag is relatively new, they'll replace rather than repair to possibly save time and/or money somehow? Perhaps an SA would know more in that vein.
I know a lot of us bought bags that were sold "as is" at the outlets. Those cannot be sent in for repair, and I have a feeling they did that b/c they anticipated having to repair/replace too many turnlocks.
I do have a vague recollection of someone here buying a bag from the outlet with a broken turnlock and they knew someone who could fix it, so even if Coach can't, you can probably get them repaired somewhere.
For those who are hesitant to buying the legacy line now due to this issue - I'm pretty sure it was discussed that that defect only affected the first batch of bags, so anything after the "first wave" of legacy items should be ok.
Ok, that was a really long post to just speculate about most things. Sorry everyone, I really am trying to be helpful