Is this called gate distortion?

Pretty straight forward guitar distortion, sort of compressor at some pot values. I think at this value its pretty much like grill distortion (putting a little DC at the grill of a single stage valve with a high value pot).
Second 1M resistor is amp input Z. Its the regular jfet as variable resistor circuit...

Should i add a buffer or is it not needed? Is there an easy way to get "automatically" more gain when there is 1.5V at the gate so the "pedal" is more gain stable?

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