LSV is back at it today, bringing you his blue Limited set review. This is a short post, but valuable so make sure you read all of his article and I'll hit you with another one so you don't wind up feeling ripped off. Hopefully you read all of these thoroughly before the prerelease and you can spend time building when everyone else is reading.
In general, blue looks pretty weak compared to other colors, but it will be a great supplementary color to solid creatures and removal in other colors. The fliers at common are absurd, and Zephyr Scribe may be the best Looter variant we've seen. I'm excited to jam some blue, especially in draft where you will end up with like 6 Palace Familiars if you want them!