well thats some nice ticket pulls. So far the last batch of tickets gave me just disappointment.
5* Mei is as nice as 6* Mei in her usefulness especially if you already have some other crit based girls, and from what I`ve seen from her scene artwork its.... well ..... quite lovely I should say.

But hey I am a Mei fanboy, she was the waifu ever since I started this game so my opinion is rather subjective.