[Dark_Knight]

To say Scott & Brian aren't an integral part of Creed is ridiculous imo. sure they might not actually write the lyrics but speaking as a musician if any one of those guys left it wouldn't be the same & you could definitely see that when Brian left back in 2000 ...Brett was good yes but it just wasn't the same (even on Weathered with Mark playing). If you listen to the old stuff it's more bass driven & without those classic bass lines most of the stuff on MOP & Human Clay would be weak.
Now speaking for Flip (I'm also a drummer) he brought something new to Modern Rock drumming, mainly his signature high-hat work which if you notice after Creed hit big everyone started doing.
So anyway the point is they're all special & bring something original to the band... that's what makes Creed unique & powerful.