Your arguments about scaling hold true for every other class in the play test though. Nobody gets multiple attacks. Spellcaster damage doesn't scale with level (except I think Magic Missile?). Fact is by level 3 a rogue using sneak attack has the highest damage attack of just about any other character of that level that we have seen. All he needs is some way to set up to get advantage every round.But just mathematically, in AD&D and BD&D backstab was +4 to hit and +1d8 damage, now it's ~+4 and +1d6, only most monsters have far more hit points. This is a worse backstab than oldschool, and far worse than 3e where you can get three attacks before they stop taking sneak damage at first level. The extra dice progression means little on the single attack limit. It's just so weak.
I mean consider, the 3rd level fighter gets 2d6+8 (average: 15) damage, the 3rd level rogue has 1d8+3d6+3 (Average: 18). Even a cleric blowing his best damaging spells is getting like 4d6+3, and he can only do that so many times per day.
Edit: As to how the rogue gets advantage all the time, hell if I know. I also didn't notice the lack of flanking at first. Either way, we all know by the time the game goes live there will be at least one, more likely a dozen, ways of getting advantage reliably, even before going to the "BS your DM into getting advantage" thing. If nothing else we'll end up with a first or second level spell that will grant advantage for a minute or so, which is all it takes.
