Looking for a sound/setup sanity check

I have a beginner's question. I've had my Cigano GJ-15 set up by a local luthier who seems to be good but not a GJ specialist (I tried to give him Bob Holo's recommended specs, but he said he doesn't believe in one-size-fits-all setup and that he'll find the specs this guitar needs to accomplish the desired end result). He kept the original 17mm bridge and added some relief to the neck (which seemed to have gone completely flat after a few weeks after purchase, because the action dropped to < 1mm). Now I believe the action is about 1.8mm on the high E and 2.1 on the low E. I understand this is considered low action for GJ, but it feels pretty good for rhythm playing with Argentine .11 strings, which is what I've been working on. Now I've started to practice lead playing, and I'm not sure what to make of the sound of strings bouncing off higher frets when I hit the lower strings with even moderate force. On sustained notes this is turning into fret buzz on some frets. I'm not sure if this is something I should get used to or if I should take the guitar back and ask for higher action. It's hard to tell because you don't usually hear sustained notes on the lower strings during actual playing. I would say the fret bounces and buzz I'm getting are rather close to what one hears in this Yaakov Hoter video when he's playing slowly and deliberately on the lower strings (e.g, 2:00-3:00 and 6:00-7:00):



Is this the normal sound for a GJ guitar, or is this just what low action setups sound like?

Thanks,
Michael