@VincentNZ
Somewhat correct. Currently, the rules aren't implemented correctly and dual-wielding is better than 2H.
When rules are implemented correctly, dual-wielding will still technically give you more damage output, but it's a very small increase in damage for the cost of a whole bonus action.
After level 4/5 depending on feats, 2H will deal more damage.
Stealth is currently only main-hand, but this will probably(?) be changed. 5e RAW you can sneak attack with any attack, once per turn. Thus you could sneak attack with your main hand or off-hand attack (but not both). You also are supposed to be able to sneak attack during attacks of opportunity, which is not currently implemented.
