DPS caculation in game

does anyone else think calculating dps is very hit and miss?

and before anyone says I am aware of POB, but that is also far from perfect, would be really cool if we could get some kind of training dummy or something in our hideout that we could hit with skills can check its damage taken or something.

could have the option to reset its taken damage, maybe even like hit splats or similar?

should be easy enough to create an object that has normal defence as a bench mark and just reads out how much it actually got hit for.

anyone else think of any in game systems that could be added for this?