Yes.

NPC's with plot armour become stale because you know that they're going to survive - so any tension is lost and screen-time is wasted on them as everything will wrap up far too neatly. The game needs to stop playing things so safely and be bold enough to kill off major characters. Not frequently, but enough so that it's more than just minor NPC's, nameless NPC's and antagonists perishing.

It's made even worse by some NPC's being popular based entirely on their good looks rather than because they're particularly interesting. Lyse and Aymeric are prime examples of this. If Aymeric looked like his father you can bet he wouldn't be nearly so popular.