The amount of modest elitism on these forums cracks me up sometimes.
Poor Revolted, his guildies are constantly making fun of him because he can't melee crit for 6k and is often caught slumming it in R6. Noob.
On topic, the Utter Disintegration proc does around 1057 average damage. Compare it to the LGS vorpal (5% chance) effect doing around 665 average damage (33.25 damage per hit) or the bonus (1% chance) 2000 elemental damage (20 damage per hit).
Proc rate is important. Regular Disintegration has a 2% proc rate, if Utter Disintegration has the same proc rate, then it's doing 21.14 damage per hit. For a ML29 Raid weapon, Utter Disintegration could probably use a little boost. 1.5 to twice as much damage wouldn't make it OP, but would make it more desirable.