I have noticed a trend in Conquest. Very few people run medic. Although a good squad always has one, the revive rate is really low. Medics no longer want to leave cover to revive and why should they? Unless it is a squadmate, most people go straight to deploy on the larger maps. Even the medic rifle is not good on most maps that are close quarters and fail at range on the larger maps. They cannot compete with the OHK of the Recon class, most have no optics, and some are just horrid at range.
Yesterday in about 20 conquest games the average amount of Medics in Conquest was 5. Assault and Recon made up the bulk of the teams with Medic and Supply really low.