So minor pedantic point is that you posted in 'Bass Guitars' which may not get you the best response compared with 'General' or 'Technique' forums.
So admin out of the way, go tell your guitar player to f**k off. As long as you play the music, technique is secondary. And your technique whilst uncommon, is not unusual and I suggest you seek out the work of Damien Erskine to see how far you can take it. He's written a whole book on it called, 'Right-hand Drive' and he incorporates fingers 1 & 2 together with the thumb to get some serious dynamics and expression down. Some of his lines are phenomenal.