Resolution for an adjustment layer?

[Hoogo]

I just would like to ask to make it more flexible, is there (tricky etc.) a way to use normal gradient tool for those vectors?

No, once this was suggested, though. But the normal way to edit a gradient on a vector isn't that difficult.
-Create the vector
-Open the dropdown for the foreground color ad choose a gradient
-Switch to the vector point tool (key "V")

Another not so obvious trick to save memory is to create a mask from a virtual layer. Useful for luminance masks.
-Create the virtual layer
-Add the curves to it as a child layer. Or Threshold or any other Filter you find useful, or add none at all.
-Then add the adjustment to the layer itself.

You can even take this farther when you first group the virtual duplicate with nothing, then do all these tasks for the group. This way you can add other layers to the group for more effects.

[evren]

-Create the vector
-Open the dropdown for the foreground color ad choose a gradient
-Switch to the vector point tool (key "V")

This is exactly what I was expecting to do. And the other tip to add on virtual layers is what I was doing in case of multiple filters. But I was doing with copied layers. I'll try virtual in next.

Thank you to spend time to explain.
Best regards

[Hoogo]

...to add on virtual layers is what I was doing in case of multiple filters...

You can add multiple filters to one layer using the adjustment dialog (view > panels > adjustment layer). There's that tiny button with the + on it.