I think DS dps is more than you expect. Here are results from a random collection of trash mobs for which I, a ranger, am MT, MA and Puller. Healing is from cleric mercs who neglect to cast RDS. The DS DPS is a combination of worn, self buffs, a mage long term DS, DS recourse from a ranger DoT, and a Mage 5 min DS (Surge of Shadow). Max DS dmg per hit is around 5K. Average Environmental DPS is around 2.8K. Cleric RDS would, I expect, be additive.
/tell Deloehne Deloehne -vs- A scout (4), An infiltrator (2), A trapper (2), A salver (2), A snarer (2): -- DMG: 56692080 -- DPS: 50259 -- Scaled: 50259 -- Slash: 18339124 -- DirDmg: 13150193 -- Pierce: 9436461 -- Crush: 7913166 -- Hit: 4091630 -- Environmental: 3224987 -- Kick: 415567 -- DoT: 120952 -- % dmg as normal: 50.9% -- % dmg as critical: 49.1% -- Non-crit rate: 69.5% -- crit rate: 30.5% -- Attempts: 8535 -- Hits: 7676 -- Missed: 859 -- Accuracy: 89.9% -- Avg Hit: 7385 -- Max hit: 174251 -- D ...
I don't know about anyone else, but I am as much interested in parsing group events as I am raid events. Knowing how much DPS a DS actually does will influence my choice of spells to cast and the order in which they are cast. For all I know, it might influence raid buffing as well.
In short, I don't see benefit from consolidating DS damage, I see no harm in keeping it as is, and I expect that fixing it will cost someone time and resources.