I dont see a problem with it. Honestly, I think itll be hard finding groups for it as I doubt itll be anywhere near as good as FATE or Dungeon grinding but thats on those setting it up. Only thing is I dont really recall any areas where this type of thing is encouraged with quick spawning elite mobs. As for FFXI grinding, IIRC that game had stationary groups waiting around while the designated pullers brought the mobs in to kill. I doubt itll play out like that in FFXIV, specially with Heavensward speeding up the combat even more (I believe).

Honestly, why cant you just get dungeons groups going? Its pretty much the same thing, killing elites over and over until your eyes bleed. The only advantage I see with EXP parties is being able to grind with any setup. You say people dont talk in dungeons anymore but IMO thats more because of the whole randomness behind it and the fact that you wont see those people again after 30 minutes or so. Setting your own server group whose there to grind out dungeons for hours should be a little more social. Have you tried it?