There is NOTHING the 6.5 Creed will do that my 6.5x55 Swedish won't do. Since I handload I can easily best the Creed's ballistics and velocity. There has been a lot of hype about the Creed but when you get right down to it a number of 6.5mm cartridges already exist that are just as good or even better: 6.5x55, 6.5x57, 6.5x68, 260 Rem, 6.5 Rem Mag, 264 Win Mag etc...
The Creed filled a niche that really didn't exist in the first place. But hey if you want it, go for it. Since I have the aforementioned 6.5x55 as well as a 6.5x54MS I don't see the need for one.