I think Hornady would have done better to have brought out a premium grade .260 Rem. with really good brass. The only thing I have heard against the .260 was dodgy Remington brass which requires a lot of sorting and preparation... or necking down .308 Lapua.
I think the 6.5 Creedmoor will be a dead end for them, like the .30 TC and .308 Marlin Express. Advantages which only appear in magazine articles don't last well.
One story on barrel life, I saw a LR shooter who said his .308 was shooting well the last time out at 4600 rounds fired have complete failure trying to stretch it to 4700. It would not stay on the six foot backer at 1000 yards.