Whether or not discriminating is bad or good is not up to us to decide. Perhaps something like this would cause more bad, than good, which I believe is what the developers think.
When discussing possible content I like to look at it from multiple angles to fully judge the possible outcomes. "How would this feature perform there, or there? Will it cause more good than bad for the community as a whole? Does it please the majority?" Things like that.
Also, frankly, I agree the DPS Tool would be extremely useful and would feed my curiosity. But do we NEED it to overcome the mechanics in this games battle system? I don't think so.