That's an interesting question, and much as I like the 6.5 CM, I think my answer would have to be "No."
I have just started playing (working?) with a custom Remington Model 7 in 7mm SAUM. I was looking for a Model 7 with a magnum bolt face, thinking that eventually I would re-barrel it in 6.5 SAUM. The barrel on the 7mm SAUM has the same twist rate as a Model 7 in 7mm-08, so I should be able to download the 7mm SAUM to 7mm-08 velocities. By that same reasoning, one should be able to download a 6.5 SAUM to 6.5 Creedmoor velocities. But the upside of the SAUM cartridges is that they can drive the heavier bullets to higher velocities for hunting larger game. 6.5 caliber bullets have great ballistics, but I'm really liking what I'm reading about the ballistics of 7mm (.284) bullets.
So just like I like .357 and .44 magnum handgun cartridges, that I reload across a wide spectrum from mild "special" to heavy magnum loads, I'm thinking I like the potential for the 6.5 or 7mm Short Action Ultra Magnums to be loaded across the spectrum from mild to wild. So if I could have only one "do it all" rifle, I think mine would be a 6.5 or 7mm SAUM.