Originally Posted by
Angelus_dead
There would be absolutely no measurable hardware/software performance penalty to treating Cleave / Great Cleave like the D&D 3.5 versions do.
The reason not to use the D&D 3.5 Cleave definition is because it'd be stupidly useless. +1 attack each time you kill a monster? That's meaningless. Changing them to an AOE melee effect is a good thing.
The key change needed for DDO's Cleave is that effects which increase your attack rate should apply during the Cleave: GTWF, GTHF, Imp Shield Bash, and Doublestrike. In addition any percentage boosts to attack speed should be treated as additional doublestrike and offhand proc.