Honestly, don't see why so many hates Lzura's outfit

Is it strange that I actually think that feather compliments her hair and outfit?

It's because it's another Fates character and if there's one thing the fandom hates more than Fates, it's Fates getting more exposure than other games.

Personally, I'm not bothered by this. Though a little intrigued.

why would a water themed hero wear a feather?!?!? T R I G G E R E D

The feather is a reference to her mother's outfit so that's actually some great attention to detail. But people always hate on the Legendary outfits so that's nothing new.
Most of the salt is probably just because it's a Fates character tho. Which is stupid, because it's been literal months since Fates has been represented in the Legendary category. So it's stupid that even though it's about time for a Fates rep, everyone is still gonna freak out even though we've gotten Legendary Hector, Marth, Erikia, and Tiki since Ryoma, characters who people complained weren't getting enough exposure at the time. But now they are, so I don't see the problem with letting a Fates character shine right now.
The fandom is so flip flop sometimes.

people are just mad to be mad, it seems

The feather seems way off. With the baton thing, she looks like she's in a goddamn marching band.

They're mad at the wasted legendary slot being used on a unit with 3 other alts, technically 4. It's excessive if you ask me though I love the new unit design. There are now 5 Azuras. I have an Azura I'm happy with and it's enough for me to just wait.