"infantry combat was dominated by the Medic class back then, not the Assault class with the grenade launcher."
Yeah because they nerfed the noob tube and the c4 chucking (a beta special that was hilarious to see games of nothing but discus c4 throwing but thankfully quickly patched) and the special forces medic G36E unlock was superior to the assault weapons.
All the explosives have low splash damage. The C4 is weak as well, instead of two c4 blowing up a tank like the old days you need to throw all of them (it's hard enough c4ing a tank with the instant spin guns and the 3 repairers hanging about, making it require all the c4 means constant deaths right before you can pull the trigger), same with the tank cannon. Even the IFV is weaker than it probably should be (it should be one of the strongest anti-infantry weapons in the game). The AA tank might as well be shooting rubber bullets.
If they buffed the radius/power but added a decent arming time it would make the grenade launcher more useful.
I suppose they don't need to prone now, so it's not really "dolphin diving".