I honestly dislike it. They haven't recieved new armor, they've recieved
LESS armor! It's cool seeing that concept from the old cinematic make it ingame, but I mean if we see these models being used on night elf archers and soldiers in large battles, it would feel ridiculous. I mean when your city, along with pretty much every other elf nation (Suramar, Silvermoon, House Ravencrest, etc) is full of sentinels armored head to toe, why the hell would you send out forces who are basically naked?
They don't look like they're ready to go to war, they look like they're ready to film a bad porno about a war. There is just so much more they could do to make some culturally-themed and traditional looking night elf armor. There are SO many concepts -- so many Kaldorei military organizations, who wear full suits of armor which still looks decorative and badass that they could have drawn from to make something truly iconic. I'm talking about the Rooksguard, the Wardens, The Sentinels, etc.
There's even just lots of cool fan-made concept art out there that would look cooler as models in game than the weird victoria's secret lingerie we see here. So instead of these:
We could have something like
these:
Those last two still show some skin, but it's still more tasteful and a bit more functional-looking than those models we have now.