Asymmetric wear of tires

Dear all.

I need advice.

I have a fairly new Domane S6 2017.

Came with 25" tires. I called Bontrager and they told me I can fit 28" with no issues.

So I did. I also got new (larger tubes) and a bike fit.

The bike gained a lot of comfort and performance even though I know most of it has...