I get the allure of open class and see it as a happy medium for those who want to pump it, but want to be able to go toe to toe with electros. My first day of play in 1993 was with open class pump, and I haven't played open class since.
I'll play stock class vs anything and unless I'm out numbered I feel fine. I have about the same success with an SC pump as I do with a semi, I just use less paint. I get out just about the same amount too.