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Good question. I think you would want to have a clean pick attack. No interference from your fingers. Because I use the index and middle fingers to hold the pick on the backside I did have to make some adjustments to have a clean attack angle, The said I sometimes do allow the middle fingernail to stroke some of the downstrokes just to achieve a different tone when striking the strings. I’ve worked on this especially when muting strings by lifting the fret fingers up slightly so that I achieve that muted string tone.
So If you are allowing the finger to touch the string and it isn’t affecting your tone you are cool. I think I would make adjustments and see what kind of tones you can put together by adjusting that finger. You might invent a new guitar tone/technique. Who knows.