When I used carto tanks, I mixed my juices at 12mg and then added flavors..so that brought the total mg down some. (I don't use much over 10% flavor) Then when I started with ss mesh rbas, I was getting headaches. This last batch I mixed at 10mg (before flavoring) but I think it's still too high. So today, I mixed some PG and VG 50/50 and started adding it to my tanks to cut the strength in half.
I'm a little concerned that the fda is going to do some sort of regulation on nic and the price may soar. So I stock piled a couple large 500ml bottles. If I can continue to cut my nic, I'll have enough to last me for a long time.
But to answer your question.. yes, I had to cut the strength of my mixes pretty much in half.
When I started using ss mesh I didnt notice much difference in nic strength, just flavor. However as I increased wattage (doubling what I used to) I noticed I could half it. Even nic free juice is satisfying to me.
I am pretty sure it is attributed to the efficiency of a well built RBA to go through more juice not so much the nic being boosted, I would imagine everyone who has had to bump the nic down has also started using more juice than they use to. Which would explain why you would bump it down some bc you are vaping alot more juice than you are used to vaping.