I'm glad you found a resource that you feel is helping you become better. Unwanted advice is fine but when someone let's you know they don't need your input and you continue that's harassment by the way. Keep you mentoring in the novice network where it belongs.
Yes the 50% increase is tied to 20 stacks and there are also performance based nudges but you are always generating at a set rate based on job. The reason you feel like you get an immediate extra bar is for certain thanks to swinging an objective while succeeding in the melee without dying or because you secured the bonus from the supply drop(more objectives btw).
This all started because You don't seem to know what you think about LB. You began by saying slower LB was bad because jobs need them to fill their niche. Then you said MNK and SMN are unappealing sans the frequent LB. This somehow drifted into you hero worshipping unnamed achievement hunters who may or may not be cheating but do it subtly if they are. And now we're come full circle to I also don't find LB generation fun.
https://i.imgur.com/EIe799w.jpg
I'll try harder to reach your lofty expectations. In the meanwhile I'll pass on the Discord for the same reason I pass on all those valued shopper cards everyone tries to stick you with. But by all means you enjoy.