Might not be the axles. We had the leaf springs go flat on one side and that caused tire wear. It was hard to see until we had it on a flat piece of concrete.
With these smaller tt, uneven loading of the trailer can put too much weight on the tires and cause uneven wear, although that's not common.
Did Camping World actually see the trailer or are they giving you their best guess as to what's going on?
If it's covered under warranty, I'd let them do it. If not, I'd get a second opinion from a trailer repair place.
2015 Dynamax REV 24TB class C