I doubt that. Making good animated models is not an easy task. Lower hanging fruit would be making new maps, new static meshes, scripting/coding improvements, making new experiences using existing animated models. So technically before you get to the point you need md5 exporter, you would have done many more mods for Doom 3. And that never happened after ~2008.
I agree. Ironically, I find it harder to get new animations in to Doom/D2 then I do Q2/3/D3 because tools now a days aren't designed for setups like that. I've done it, just more hoops to go through. Learning a 3D program is a PITA and players are super-critical of any releases compared to the 90's. A lot of negativity a modder has to put up with if they want to release something now a days.