From what I've experienced and read, threatened doesn't always work, making sneak attack feel glitchy. Also high ground advantage is right now the most reliable form of advantage and is bordering on broken. Other forms have issues. True Strike works best before combat starts. Guiding Bolt requires someone else to hit beforehand. And Faerie Fire is a concentration spell which is problematic with terrain breaking concentration. Also Bless shouldn't be allowing Sneak Attacks to happen since it gives a d4, not advantage. And other sources of advantage such as Familiar Help Actions are missing right now.
Sneak Attack right now needs a lot of ironing out, but it also depends on advantage also getting ironed out.
