Groovy.
And no, I don't see that tendancy being widespread, but I do completely agree that optimization doesn't guarantee a good RP experience either. But I think what you are talking about are just poor RPers. They didn't get made poor by their optimizing tendancies, they were already bad at it. Seems they found a segment of the game that they like though - the mechanics - and its good they are enjoying themselves. Unless of course they are detracting from their fellow players' enjoyment, but as noted, there is a name for those folks too, and it isn't optimizer. It's jerk.