Display More-1 for me
let me elaborate:
the normal noisegate removes hum and hiss (don't quote me on the latter) while trying to preserve the dynamics of playing.
The 4:1 and 2:1 noisegates just cut everything (including guitar tone) below a certain threshhold (again, don't quote me on the technical mumbo-jumbo).
I often use both types of noisegates combined for really high-gain sounds. And this is mainly, because the normal noisegate can't be set high enough, without seriously affecting the guitar tone (doubler/sitar effect).
With super highgain, the 4:1 or 2:1 are dead silent, but once you start playing, you get the hum on top (which is removed only by the normal NG).
EDIT: plus the 2:1 and 4:1 noisegates slightly affect playing dynamics. It is subtle, but it is there...
So basically, I'd vote for a further improvement of the normal noisegate (if possible - it is already improved, but it is about 7 - 10% off from being perfect).
Or if it suits you guys: let us manually choose which noisegate to use on the NG dial. (but for me: do not get rid of the normal NG)
I am in the same situation. Keep the front gate!