If you want to socialize, you will find ways to socialize. This is a personal issue and not something solved via any ingame system. The only reason it sorta worked in XI is it was such a slow game in all aspects. You had time to converse as you waited for the auto attack to build up your skillchain. Even if there was an area like the dunes in FFXIV, if people are training enemies to make this method efficient for leveling purposes (which is what you guys are asking for) then when would you have time to type and talk between using skills and pulling new mobs?
This game does not lend to this and even if it did, the people that would chose this method over all other methods of leveling will not be the kinds of people you are hoping to attract. it will be like hunt parties when they were "the best method" or FATE parties when it was "the best method". I know you guys have a soft spot for the archaic methods of leveling but the landscape has changed as well as its participants. There are some really well worded posts here explaining how to do it and reasons why but they are not taking a realistic approach and have some heavily tinted glasses on.
As it's said, If you want people of a like mindset to do this, they will do it for the social aspect, not necessarily for the exp gain because that is in effect the golden egg of this system you are holding up. Just go out, find a good FC and make some friends and play together. This was a HUGE thread way early on in ARR beta and at launch, SE replied then and I don't think the stance has changed. I'm terribly sorry about your luck but to make this work as you want it to would require many fundamentals of the game to be changed to accommodate it. FFXI is still going and if this is the system you hold above all others in this game, feel free to play FFXI or hold out for EQN (if that is even still coming) or some other company to make a more hardcore style of game where this is the system of choice.
EDIT:
This is a prime example of not understanding how todays landscape has changed. As i mentioned earlier about Hunts, once it was decided as the "best method" EVERYONE flocked to it, not because they liked the system but because it was the "best one". Players are always seeking the path of least resistance to getting what they want regardless of the fun factor. The go so far as to google the best cookie cutter way to do something and if you do it any other way you get ridiculed for doing it wrong. I'm not one of those people but the ones that do this drive the game. I wanted to do PvP or Dungeons during that time but I could not do any of that stuff until it was nerfed. I was reduced to doing solo content. It would take so much effort to balance out exp per hour based on levels, based on speed of killing, on an average party, then one party will come along and kill the system by having a party of all WHM's (or something) where they just roam through the whole zone steamrolling everything with Holy spam. Open world content is a lot harder to regulate then you think.