I've seen those threads as well. One of my friends is a pilot for another brand and was having similar problems until he changed servos. For whatever reason, the model of servo he was running was causing his issues.
I run the Bavarian Demon in all my helicopters, including my N7 without any issues.
If it's sluggish after making those adjustments, change the "agility" and/or "initial response" settings.
Like I said, I can make myself available in person at IRCHA to anyone who wants my assistance setting up their BD gyros.
I follow what your saying, but I have been tuning on these units for over a year now. you either have one or the other. if you have your head gain turned up over 70, you will have an elevator bounce. If you turn it down and you eliminate the bounce, you will be able to dolphin the heli in FFF with pitch pumps.
take yours out today and try both. do some hard elevator stops, tick tocs, rain bows, and in the same flight do a fast pass and give pitch inputs. I would be willing to bet you have bad tendencies in one of the two.
but again, I have them where they suite my style for now. I don't fly fast all the time, so I have the bounce tuned out. I don't need to up my agility or initial response, its fast enough and I like it off center. its the "locked in" feel that is sluggish. increasing P gain a little will help with that, but not like increasing overall head gain does. increasing d gain CAN help with elevator bounce issues, but not very much at all. the elevator filer is the most useful, but still doesn't get the job done like it should. BD should allow for adjusting all of the parameters like the IKon and maybe we could get it tuned out with a higher gain. Or, it may be a control loop issue (which I am betting it is) and no matter what we could adjust it still wouldn't work until they fix it with firmware.
by all means lets get together at IRCHA and talk about this more. we can fly together and I can show you what I am talking about.