First of all i do a lot of Vocal editting with WL10.
This means i select a part of the vocals and adjust gain.
Mostly bij +0.6 db / - 0.6 db (increments).
So i use the apply button a lot.
Each time i need to change between - and +
So if there where some buttons +1db+apply and -1db+apply that would make it a lot quicker.
And really this POPup Gain window has not been worked on since WL5!