Originally Posted by
Angelus_dead
It's not a question of difficulty programming it... it's the fact that D&D rules cleave would be worthless in the realtime environment of DDO. D&D fighters defeat monsters with a hugely higher percentage of their hits than DDO fighters do, meaning that DDO fighters must be able to trigger cleave on more than just kills for it to have a similar benefit to character power.
The best way to start fixing Whirlwind would be to fix the prereqs so that Mobility and Spring Attack are valuable feats on their own.