Thank you SE!! (DF lockout)

[HEC-]

ONLY if they can allow direct invites to the dungeon.

I hope this would never happen! Why? Well - while someone like you might use it for actual benefit of abandoned group (although there will be more partial groups out there which you'll effectivelly put at "disadvantage" by this) what will soon start happening is that group of "friends" will kick strangers before last boss or wanted loot chest and invite one of their own to "help" (themselves to loot or easy run etc.). So - no thank you!

I don't think this system will have a very noticeable effect on my playing habits.

You seems to be missing point here - nobody realy cares about (change of) your playing habits. What do they care though is that you by either stopping playing entirely or by being able to time out / decline duty limited amount of times will stop wasting their time!