Just for the record I have 4/5 AF2 I haven't had a lot of luck with RNG and Allagan Drops on PLD (always stuck seeing MNK/DRG/BLM drops which is another issue lol). I wont be passing on a Allagan piece just because I think I will look like a "clown" without the full AF2 look. At the end of the day I do not sit and look at my character in town. I enjoy completing content so if that means I have some Allagan and some AF2 then so be it. Takes 2 weeks to get AF2 boots when on a specific job you can get them in turn 1 or turn 2. Just because you have mixed and match gear doesn't mean your elitist. And preferring a specified piece of gear doesn't make you "elitist" For example their are some pieces of PLD AF2 Vs. Allagan that have ACC instead of Parry and to be honest I'd go with Parry or more VIT no matter what I look like. If someone in my static passed on an Allagan piece of gear because they are holding off for full AF2 then that is cutting through my time to gearing up for Turn 5 and what's to come.
On and end not, I do see what you are saying though if your stating someone wont play with you because you don't have the BiS "lvl 90" slot then that is BS. My personal opinion is the lvl 90 gear no matter if its Allagan or AF2 is the BiS above the lvl 70 gear and will be efficient enough for you in coil ++ and I don't see someone who is enjoying endgame content passing on Allagan because they want a certain "LOOK".