Cawcklest King the one thing I'd add / modify on to that is that you never need to use the action/bonus action auto combo that occurs if you choose "sneak attack". Just set Sneak Attack to always "ask" in your menu (for me sneak attack is always ask except on crit where it's automatic), then a regular bonus action attack with a hand crossbow will trigger asking as long as it's eligible for sneak attack and you can throw that on there. The one reason it might be worth it is for the difference in range, but it's only 3m extra (15m vs 18m).
Yeah, you can toggle to only one blade or set it to "ask".
What I was saying is I prefer to use the crossbow because you often do about the same or more damage using only one Action than you often get using dual-wield/an Action + Bonus for attack, at least with daggers (might be different if you use other weapons instead, but I run daggers and crossbow), which means you get to do a lot of damage in one attack and then have 2 bonus actions left over for a Dash and then Hide.
