I think it would help to make a big numer content similar as Dynamis in FFXI. We have often the problem that we have 15 or 17 ppl Moogle/Ifrit so not everyone can enter and/or we can't make a good balanced pt since we have some newer ppl there as well.

And a funktion to make an alliance (so 2 or 3 pts can share treasure stuff) would be awesome as well thinking of Stronghold Bosses.

Even If creating a mass event is too much trouble atm please give us the option to ally up 2-3 pts.