I think part of it is that there may be less medics out there. It was my first class (keeping in tradition with BF2 and 2142) and because of the firepower and paddles, you can max it out quite quickly. Now that I've done that, I'm working on my other classes (which I suck at even more than medic) and only play medic if the team is hurting and I'm completely ineffectual with my other kit of the day. Wouldn't surprise me if I'm not alone.
That's because the medic/assault class was overpowered, and people brought the defib along anyways. The community wasn't "better" then -- this was just something everyone would do because it was paired with the most effective weapons on the battlefield.
I think this is the biggest reason why there's significantly less revives. In 2142, I'd say 50% of any team, at the very worst, consisted of the Assault class (which had the defibs). I actually this it's closer to 70%, but I'm being conservative. With that many more defibs more there, you're going to have a lot more revives.
Now, with more class diversity (aka more snipers and more engies wielding Gustavs), there are less medics, and thus, less revives.
The biggest gripe though, is when you see medics walk over your dead body. If there's someone to engage, I get that. But how about a revive once the coast is clear? You get free points, I don't see why you wouldn't revive.
... walking into a room after BrokeBack entered it, and just seeing a pile of dead corpses, and he's all cheery, happy-go-lucky ... that bastard. -Zhohar Brokeback shoots better with a lazy eye. -xBadger