I get what you're saying, and you and everyone else are entitled to your opinion. However, try to see it from the other end too. What you consider more freedom of choice in altering the Xaela is limiting to players like me that like them as they are.
And you saying "well there's still the Raen if you don't like it" is like me saying "Well you still have Miqo'te if you don't like Au Ra". You have made it very clear you don't like hearing that. Well I don't either.
I prefer the color palette and contrasts the Xaela give. I like that they can in fact look menacing but then turn around and be charming. So I should have to give that up just because you don't like their emotes? I agree that some choices didn't make sense (I don't get why female Xaela don't have the black/gray sclera. That is a very odd choice to me). It doesn't bode well with everyone, but then again not every race is going to appeal to every player.
These were literally the thoughts I had when making my first character (and I'm sure I'm not the only one):
"Oh hey, Elezen are really pretty. This one I made is actually very cute! ...wait...why are they THAT tall? If they didn't loom everyone like that...and that run. Instant nope."
"Woah, Female Roes are really pretty. But again, I tower over everyone. And they're a bit too brutish for my liking. That's a bummer."
"Cannot stand the voices or the princess run of Hyurs. That's a shame because I really like the hair offered for them."
"Lalafell are adorable, but I don't like how the gear changes for them. So much detail is lost due to their size...that sucks. Why didn't they just shrink the gear down, they didn't have to change the details themselves."
"Why do keepers of the moon act the same as keepers of the sun? Especially females? Since they're matriarchs shouldn't their emotes be more demure or commanding?"
These are legit opinions too, and I'm sure people have brought similar ones up. But you don't see entire threads asking SE to change these things just because of a few people who might play the race if those select things were different. I ended up a moon miqo'te because despite it not feeling entirely right, it had more of what I was looking for compared to the other races at the time. I didn't make a thread complaining that it wasn't what I thought it should be.
The differences between most races are really only one or two things, one of those things just being color palettes (with the exception of Hyur). Nothing wrong with asking for more diversity between sub clans of each race. That is a welcome thing. However asking for a race to appeal more to you by sacrificing what others already like about it isn't fair either.
"This isn't what I wanted, so change it to what I like and let all those people who liked it before just switch to the other tribe. They can deal with it." Is essentially what your argument amounts to.
As for the beastly tribe thing...so all this effort you're spending trying to get them to change a race, which they're known not to have done already, is more likely to happen than protesting the possibility of a new race more to your liking? They didn't follow the poll they made to a T, but at least they did make one to show they're curious about what people want to play as. At this point you and I are running in circles here. I will say that things like the options of adding more scales, or a universal height slider for all races are brilliant ideas that should be promoted.
All I can say is if you do choose to help back a petition for the kind of race your're looking for, I will gladly back it with you. Been in that situation where my character never felt right since I started playing as a female Miqo'te, and it sucks. So anything that can be added or considered to lessen the number of people that feel that way I'm 100% all for. But I'm not going to agree to give up this character that does finally feel perfect either.
And this is where you can't please everyone. To me they look plenty menacing as they are or have the capacity to with what's available. But different strokes and all thatI agree, none of the default poses are all that grand for the races anyway.