Yeah. Sneak shouldnt be a toggle. It should apply automatically each round.
IMHO, as a DM, It should default to the first attack of the round, but if that misses then the player should be able to add their sneak to their offhand attack.
At least thats hnow I run it in my campaigns.
As a side note: If you did a sneak in game and it was low dmg, was it just a bad roll?
When it comes to criticals, I max out the extra dmg dice(excluding sneak dice obvs) so crits actually mean something. There is nothing more frustrating for
a player when they finally manage to get a crit, roll an extra dice and get two 1s. But I warn players that it works both ways. Though sometimes I might fudge
this if the party looks like its about to die.
That might be how you houserule It, but as per rules It should be chosen by the player after the attack roll, so the thing that comes closer os a toggle as a popup every hit would be anoying, and If you like the automatic better... Leave the toggle on?
Really I don't get people advocating for automatic when all It does is limit things for those who want the Full feature as per PHB, and you can just leave the toggle on and get everything you want as well, you literally lose nothing, just take away from others
