Been doing some Alex NM farm before we can raid later ... BLM feels exactly the same. The Enochian buff is so far as situational as it sounds (you really don't want to turn rotation 3 into rotation by default, Sharpcast isn't up usually even if you would), and the Thundercloud buff, you really can't use them without sacrificing F4 for, because the later your rotation is before B4, even if you technically have time, that makes dodging that much hairier and limits your options greatly.

Just my impression after a few dummy trials and some A1-4s. It is a DPS increase just on the fact that you can use Thundercloud as filler more often, and Thunder does a little more, but it's not a big increase, and I kind of wonder why they did it in the first place when the complaints were about Enochian timers.