Please consider buffing rogue's sneak attack to once per action like how booming blade works in patch 8 update 3. Rogue's sneak attack in bg3 is once per round which is worse than 5e's once per turn. Pure rogue is one of the weakest martial classes to play because how easily you can stack magic item effects and apply them over and over again with extra attacks.
I don't see how this would help pure rogues compete with rogue multiclasses. Unless there's something I'm missing or neglecting, it would also have the effect of making gloom stalker assassin even more powerful.
Pure Rogues get stronger Sneak Attacks due to them scaling with Rogue levels (Not character levels)
Thus, being able to Sneak Attack more often provides greater benefits for Pure Rogues that have more Sneak Attack damage dice than any multi-classes that will have fewer Sneak Attack damage dice.
Of course, it will ALSO benefit Rogue multiclasses, who will still be gaining even more damage from being able to Sneak Attack more often, just it won't benefit them AS MUCH as a Pure Rogue. It's merely a case of "Would this additional benefit that a Pure Rogue gets be able to not only bridge the gap with other builds, but bridge it enough to also cover the bonuses Rogue Multiclasses would be getting from the same change?"
