Looks roughly equivalent to AA "Main Cabin Extra" with the added bonus of "special cookies". Unlike AA, JetBlue is setting a defined limit on the alcohol at 3 drinks per flight, which they are clear to call out, does not stack with your Mosaic 3 drink allowance.

At least my companion(s) will now be officially entitled to 3 free drinks, if we sit in the good seats.

https://news.jetblue.com/latest-news...f/default.aspx