Do we have those symptoms in common?
My location is pretty quiet compared to what others have to deal with most of the time which made the old NB work better on atmospheric noise for me but also distorted the high strength signals audio much worse so I hardly ever used it.
Unfortunately there are so many different kinds of interfering noise on the HF bands that there will probably never be a perfect noise blanker for any and all type of noise with out having a plethora of user settings that most users would have much difficulty setting up correctly for the ever changing atmospheric and man-made noise on the bands.
I thank the FLEX engineers for building a great SmartSDR update to the Flex signature series and I know that there working hard on trying to find the bugs we have found and reported and get them taken care of.
There is a lot of confusion as to when to use WNB and Whento use NR.
A lot of the complaints that WNB does nothing is likely due to a total misunderstanding of what each of WNB and NR does.
Correlated Noise is noise that follows a repetitive pattern such as ignition noise, electrical fences, fluorescent ballasts. WNB listens to a broad area of spectrum to see if it can identify a pattern. If it does find a pattern, then simplistically it inverts the pattern and injects that pattern 180 degrees out of phase with the original corolated noise source to cancel the noise If you look at some of the videos you will see that WNB is removing an astounding 25-30dB of correlated Noise. This is clearly a Best in Class achievement as I am unaware of any other Ham grade products that come close to this.
Uncorrolated noise is random noise that does not follow a particular pattern. If you have uncorrolated noise then you should be using NR to minimize the noise. Most of us have uncorrolated noise and should be using a combination of AGC-T and NR to mitigate noise.
ANF - automatic notch filter is a specific filter to notch out a single noise source.
TNF. Another Flex exclusive is multiple tunable notch filters that can be placed on interfering signals ...almost impossible to do with legacy technology.
As I mentioned my Yaesu FT-2000D NB will lower the overall noise I am hearing but the 6300 WNB has no effect unless it is set at 100% and then it just starts the noise floor to jump up but no noise lowering. My Flex 5000 seems to have great effect on the noise floor using its NB.