[quote=nizanegusa]
We used to use flanking, but that just lead to "Conga Line of Death" scenarios where you had enemy-ally-enemy-ally-enemy lines so everyone got advantage.
This is what we have now actually. Lae'zel kangaroos about every turn to get free advantage, it's ridiculous and devalues all other sources of advantage like Faery Fire.
Problem there imo isn't backstab, but that Larian made all the Cunning actions available to everyone.
Make Disengage a bonus action and suddenly trying to get into backstab comes at a cost if you are surrounded.
In my opinion it's really the Bonus Actions that's the major issue, not the advantage rules.