First of all, your English is incredible and your wording is great. I think I understand now where the differences are, and it's purely subjective on my end - so I apologize for that.
The answer of "not having enough server space," of course isn't acceptable and they should do better. However, I have heard that the XIV team does suffer severely from a criminally low amount of server space compared to what they need. I don't know the exact details, so please consider this only hearsay. Personally, although I expect them to do better, I also understand this is an accurate answer.
I completely agree with you that community managers need to work close enough to the devs to be able to answer questions - I saw this in GW2 where I did find the forum response (at least in the beginning) to be what I think you're describing.
I guess after being with this game for so long I don't see what new news the forum devs could provide if Yoshi has already said it. The viera hair / gender lock thing was a major sore spot for me and I nearly quit the game over it (I had waited on Viera since they posted a poll to us in 1.x and Viera was the second most desired race besides un-genderlocking the other races). They even teased us with concept art during the Heavensward pre-release / fanfest stuff - yeah I was mad.
Still, as angry as I was, I knew the answer - They may or may not add anything due to the unique head models (/cough - floating bunny ears so I've heard - /cough). I was angry, I nearly quit the game out of disappointment, but I never once considered coming on here and demanding information. I was given information. I didn't like it, but I was given it - they might fix it. Then they changed their answer (as they do) - it did take years, but Yoshi answered the hairstyle issue I think in 2 or 3 interviews shortly after shadowbringers released saying the same thing.
NOW - if they had given different insight / answers on other forums... then yes, my entire opinion would completely change.
Anyways, I'm sorry for beating a deadhorse. I agree with you and disagree on some points. However, thank you very much for the civil conversation and expanding your thoughts!
Sidenote... I really wish I knew a second language ,_,