I read the changes on Covenants currently, and Druids just moved from Night Fae to Ventyr to be the best to chose. At least regarding to the Comparisons made by this chart:

https://docs.google.com/spreadsheets...hyKTV74fdzBXLw

Seems Blizzard will continue to rebalance this over and over and over and over again, so chosing a covenant just for hoping to get the most powerful will only work for one patch cycle. Instead of FOTM specs we get FOTM covenants in Shadowlands.