It’s really annoying when you were about to talk to a NPC, kill a monster, pick a loot and are teleported to another place because someone in your party activated a quest instance. Like protect an npc and/or Boss Fights.
There should be a warning asking if you want to follow your friend and help him or not.
And there should be a warning for him too, asking if he’s ready to start the instance.
It would be nicer. Sometimes when I was in a party, someone started an instance for him that I needed to do too, but I was one or two steps behind, and because of that we had to do the same thing twice.
Or when someone doesn’t have their HP or SP full and an instance is activated by another.
And many times I was talking to some NPC about some quest and I was taken by surprise instance.
Many, many time I’ve got the feeling “a wild instance appears” XD