Had a bit of thought about your technique...
You got good muting techniques. That's impressive, more so because you've got 7 strings. I've seen many players who can't mute properly even with 6.
I noticed when you fret (left hand), you tend to lift your hand off the board quite a fair distance. Try to minimise that because it's not economical + it takes too much time to fret, especially for solos/single notes. Consider practising in front of the wall or door (advice originally from Frank Gambale), and try getting your fingers to stop jumping off the fretboard (i.e. don't touch the wall/door).