While I agree with some of what you wrote, I disagree with some as well.
For starters, the 6.5 Creedmore falls short to a well loaded .270 Win...
Not even close. The .270 fails out of the gate due to the only SD > 0.3 bullets having to be intentionally blunted to achieve stability. The BCs suck. It's crippled as a big game rifle.
Call me when there's an equivalent of the 160gr .264 Weldcore that'll stabilize in a 1:10" .270
Of course, you won't be calling because it's not physically possible to make that bullet due to the twist rate mistake made during the .270s initial design.
In the mean time I'll be shooting the superior Creedmoor and laughing at .270 losers
And it's spelled
Creedmoor. Like the range.