you are forgeting that AC attack on sleeping target will always hit and will be a crit
It shouldn't... It should be an advantage attack, that crits on a successful hit if it's made within 5 feet, but shouldn't be an auto-hit. (Can I add another 'Balance moved to Ac attacks' for that Larian change?)
Though it does rely on you getting a turn before the sleeping target is woken up... which, I'm going to be honest, happens a shockingly low percentage of the time, in most situations in EA; MOST of the time, in my experience at least, something or someone wakes the sleeping target up before a team mate can bop them, giving you effectively zero utility for the spell slot and your turn.
