I can't even play Rogues because of how they are handling stealth. It's too insulting for a Rogue that anyone in Plate Mail without any skill can sneak just as good as them by simply staying out of vision cones. Which can of course be exploited to hell and back by being in turn based mode and freezing enemies in time. Basically anyone can sneak past anything.
It should be vision and hearing RADIUS instead of some braindead cones, very narrow ones at that. You should not be able to sneak right behind someone for a melee attack in plate mail with a 100% success rate. It's really dumb but there it is, in full release.
Even invisible characters should make noise and make enemies look for them. Make that an easy DC 5 check only low Dex characters with Disadvantage and no skill are likely to fail. Make that armor Disadvantage and lack of skill proficiency MATTER.
Anyway onto Sneak Attack... I made a Rogue and it was really confusing because SA was both a Reaction and an Activated Ability now. Sometimes it happened automatically, but apparently not with off-hand attack? Off hand SA is 95% of the reason to dual wield in the first place because of how bad it is without SA. Also agree on the point that SA should of course work with special arrows.
The game needs to give mouseover feedback if an attack will be a sneak attack. Like Disadvantage is shown as red, make sneak attack black and add a stabby knife symbol next to the hit %. Why is it still so unfinished after all these years?
