UPDATE: How to Fix Touch Disease on the iPhone 6 Plus (No Soldering or Bending) | appleEducate #05
Apple declining to call it a design flaw or manufacturing defect seems to be a point of pride on their part. Phones with Touch Disease will be repaired for $149, and if you previously had it repaired or replaced for similar symptoms — which might have cost you upwards of $300 — Apple will reimburse you the difference.