It is a real shame that this issue can't be fixed. The car has been released almost 3 years ago and there is nothing that the dealer can do. My warranty will expire soon. I am very disappointed by Honda.
Have you actually been to your dealer about it ? If you've reported it during the warranty and given them a chance to fix it, you'll be in a stronger position if it recurs outside the warranty.
My position:
1. Noise became obvious during early 2017, transmission mount was replaced Aug 17.
2. Noise recurred during 2nd quarter of 2018.
3. Dealer swapped the mount out for one from a demonstrator that doesn't have the problem in June 18. No recurrence to date.
4. Dealer decided they need to replace the swapped mount onto the demonstrator so they can sell it, so they've decided to fit a new one to mine anyway; car is in with them today to have that done.
I think the dealer's doing all they can to help. The Honda mothership tells them that mine is the only case they know of (but you & I & the guys over on the FitFreak forum know different !). They won't commit themselves about what the position will be if the problem recurs after warranty expiry, but I will argue strongly that it's an "original sin" problem that I've given them every chance to resolve.
None of which enhances Honda's reputation.