I wouldn't agree with removing it, simply because while we do have a lot of people, that doesn't necessarily mean a group. Differences in time-zones and general playtimes can sometimes mean that the only way a person can actually level up is to play with him/herself. Also, while there are a lot of people on nowadays, it's still easy to find yourself the odd one out, or that the one group that's around your level is full, already has your class, doesn't like you, etc.
Also remember that the vast majority of clerics on the server only exist because people DC them with a melee. What does a cleric do if s/he can't get a group? Other healing classes can perform just as well up to a certain level, and would probably be prefered for the other buffs they can provide. What does a warrior do if s/he can't find a healer? Other tanks can be more preferable than a warrior in group situations. Freedom to be self-reliant is always a good thing, taking away DCing takes away that freedom, to a certain extent... and if you make people choose between characters, they'll go for the melee the majority of the time. I know there were a few selective situations there, but you get my general drift.
I would agree with removing it because of the reasons Wiz has above. Though removing DCing might not have those effects. In fact, it might have the inverse, might decrease server population so much so that DCing is needed again for people to level up.
There are negatives and positives. I really don't know where I stand, to be honest, but it's definately something that needs to be discussed in detail.