I think that group is pretty broad. You've just picked some players with creativity, but other weaknesses.
Cooper - flakey at Int level, some off field issues.
Cipriani - can't/won't defend, off field issues.
Michalak - flakey at Int level (Ref RWC vs England).
Henson - off field issues * 1000
SBW - no problem there, he learns and improves his play
Abendanon - used to be a bit flakey defensively? But also not really in the class of the above.