I loved the 1’s, upgraded to the 2’s expecting little, but the upgrade in SQ was massive. I have the 3’s on order, I don’t think anyone outside of Apple can pass any judgement on the 3’s yet, but I’m upgrading anyway since I use my AirPods a lot.
It's hard to say without using the 3s. The only thing that really pushed me to go from 1 to 2 was because my left bud would barely hold a charge any more. The other main benefit was the upgraded case with various wireless charging and USB-C. I noticed very little sound quality difference.