For those who don’t know, UDK’s are the only class in the game who has quadratic scaling. Most classes say deal 100 dps for each target in an aoe scenario, so for 10 targets they do 1k dps. However UDKs deal more dmg the more targets. So, if there are 5 targets they might deal 500 dps, but with 10 targets they might deal 1.5k dps. This is why UDKs are always and MDI spec.
While this is a really cool niche to have, practically what is does is force blizzard to Tune Dk’s dmg lower for lower target counts to balance their insane high target count numbers. Therefore, in pug situations, it means that UDK’s dont do great damage as the pack sizes tend to be smaller.
If you remove the quadratic scaling, it gives Blizzard much more flexibly and freedom in buffing the spec as a whole. There is also a very easy way to change the spec. Just make epidemic/ Bursting Sores do single target dmg (meaning dmg to each creature with a disease/ wound on it and no one else)