Yep, I'm still using GHE Micro+Bloom, and FF recommends 5.5pH on their website.
I usually start with conservative levels of nutes near to the end of veg. This time I'm trying higher levels than I ever have before, closer to the Lucas formula for Coco, 6ml Micro / 12ml Bloom per gallon (3.785l), though my mixing bottle is 5l, so still a bit weaker.. I'll also mix 3ml/6ml into 2l if I need less.
Def considering Biobizz, but want to be competent using the GHE before moving on.