In reply to Godwin:
Many brands have repair centers on European soil. Patagonia is even able to repair a lot of stuff in their stores!
I think in cases of delamination it's really up to the discretion of the representative and it hinges on the size and nature of the damage. It might be just one spot that is starting to delaminate, but chances are that it will happen on other parts pretty quickly as well.
Take into consideration the costs of taking it apart (especially if it's in an area such as the back of the neck or the hood), sewing a new piece in and then retaping the seams. This adds up. So it might be that the costs of repair just didn't match giving you a big discount on a new jacket. They could have explained this a bit better of course, and their responsiveness here is abysmal.
Given that two years is the minimum legal warranty on consumer goods in Europe three years is a sucky age. Stuff often still feels brand new, but warranty often doesn't cover it anymore - unless the brand decides to do so out of policy.
I am in no way trying to justify Arc'teryx here, just trying to think about possible reasons for it.