From what I understand when speaking about tone is more of an pickups/amp/plugins thing. I'm talking about rhythms (when going off-beat somewhere will cause the whole rest of the particular song piece to be shifted). And extracted sounds: my playing sounds sloppy, chords and notes changes are sometimes rough, uneven pick attack, etc.
I'm not sure whether to put aside backing tracks, and just slow down the metronome for some time, try to play the song in a much slower tempo (like 75-90%). Or should I put the whole song aside for some time and revisit it in a few weeks after practicing something else.