Some of the same annoyances with actives that are not game breaking still exist. Like targeting with Twin Fangs still is laughably bad for some enemy types (basically anything with 4 legs).
TF but lso Deathblow, even if at a lesse extent, against anything larger than a human is sometimes painful. You position your rogue at the back of a lizard or a giant and he decides it's better to attack from the front 90% of times; it also happens sometimes with Shield Bash
Another irritating thing is when you Flank Attack someone moving and the rogue attacks the thin air doing no damage and remaining out of stealth 
The positioning in this game suxs big time! I play mostly in tactical. I have no idea how much frustration my KE trying to run around to hit with that Spirit Blade. Same goes as with Cassandra. She's running around her foes trying to land that shield bash but never get to bash it. It's kinda super silly and BROKEN :/.
Another annoyance would be your character often getting frozen in place bug doing NOTHING. absolutely nothing and the only way to cancel it is you have to take control of that character and JUMP!.
also i have no idea there are couple of times with Dorian around, my other characters seems to take serious damage for out of no reason. i previously have solas.. but then he ran off... kinda suxs there's no other NPC that has that Pull of the Abyss unless you are the Rift Mage yourself.
The frozen character is a huge annoyance expecially when playing a melee char. To manouver him in a flanking position and to have him jump is ridicolous, apart losing the lingering shadow time and see the opponent turn and start smashing him; with ranged it's an annoyance, like it is with the tank, he just stand still but it's difficult he takes lots of damage, but with squishy melee glass cannons like my assassin is deadly
I usually bring Dorian with me and i havent noticed strange damage to my chars; sometimes Dorian goes way too close to opponents he should not, Sera has the same habit, but i've never seen anything unusual. My syandard formation is a Tank, usually Cassandra, Dorian, Solas and my melee rogue
What you did to poor Solas to have him go away? I never happened to have one of the team leave.