I think overall this game is incredibly fun, however there are certain things in this game that exasperate me to no end at all. For instance, instance matchmaking. If you que with a group, looking for 2-3 more members, and you fill your group beforehand that the que sets, and somehow as you're getting ready, with a full group, the instance matchmaking REMOVES the party members you just invited! Now how stupid is that? As well as not being able to invite people from your realm after someone in the matchmaking system has left, the only way to recruit new party members is through matchmaking. Very irritating. As well as if you leave the instance, the matchmaking cancels. Usually if a party member (like the tank) abandons you during the dungeon, the que time takes forever. And when you could just easily invite someone to take over for that person, you cannot, because it will not allow it. Like I said, I love this game. But situations like these truly are flat out obnoxious.

I'm not a fan of not being returned to where you were when you finish the dungeon. This one thing alone keeps me from using it as much as I would like to as I hate having to waste all that time traveling back to where I was questing before entering the dungeon.

The first point is an oddity, but also has a pretty big benefit. You're free to join other groups to do group content while waiting, instead of not being able to party with anyone because you're already waiting on a queue or you don't want to drag a random joe into the queue with you just because you wanted to group for a BAM. However, to fix how sudden it is to suddenly be pulled from your own group and put into an IMS group, they should make it clear on the queueing window or tutorials that the group that joins will be the group that initially queued, and also give the player notification before putting them in the IMS group, with a dialog box to accept or decline.

I just hate that I'm forced to keep queueing inside an instance if someone leaves because you're not allowed to manually /invite other people from your server. This is the truly retarded feature (?)

Also, about the first point: it doesn't need to be that way; just cancel and restart the queue with your new members so you won't get parted.