Oh my, this event looks good. The year of the rooster was kinda disappointing for me, didn't get a single legendary event, and even then, those weren't that great honestly. But I agree, both Mercy and Genji are tempting. I have like 14000 credits, so I might go and buy one of those (more inclined to buy Mercy since I actually use her)
I liked the Journey to the West ones. While Reinhardt's and Winston's weren't too impressive and Zenyatta's was hit or miss with the human design(I liked it. I like all of Zen's skins), Roadhog's was great for the amount of detail it had, like the Rake hook and Steam Bun breather.
Mei's was great because for one, it was a huge step-up after her disappointing Christmas skin. Two, the details with it, like the Lunar Moon on her gun and her new lines referencing the Moon Princess and her bunnies. D'Va's was fine. But then again, I liked it for being different from her bodysuit Legendaries at the time. Black Cat is superior though.
The new ones are a ball out of the park though. Genji's Tiger motif is great and I also love it as it's probably the closest to a armored knight design for Genji we're going to get(and it reminds me of Artorias the Abysswalker quite alot). Not to mention his Ultimate Line changes to mention the Tiger. Mercy's is great for the Red & Gold colors as well as the black hair which is a major change from her other recent cosmetics that keep her blonde hair. Zarya's is great, but than again, her new skins are outstanding and lots more appealing compared to her starting skins.
The details on Pharah's Dragon skin are amazing, like Roadhog. And one of the coolest details about it is that Pharah's eyes glow bright blue with it. McCree's is pretty simple, but effective. The real highlight is his very first new Highlight since release, with him walking away from exploding fireworks. And Widow's is nice, but once again, it's mostly because it's alot more appealing compared to her starting skins, especially her Ballet skins.
Edit: The only thing I'm rather disappointed is that there's no new skin for Orisa or Moira, who both I thought were good candidates for NY skins. Orisa could've had the Tiger or a Chinese Lion skin and Moira could've had a skin that referenced Yin and Yang.