Thought you was able to just not dungeon keys etc… well Atleast that’s last I heard regarding Xbox, can’t speak for PlayStation as refuse to buy all dlcs again on my PlayStation.
Games share works to the extent of the yearly DLC (basic DLC mind you) but since my kid is unable to do any seasonal activities it becomes pointless. No dungeon, no exotic missions, no season activity. All of which most players are doing. Once campaigns are completed if you don’t have seasons purchased then your basically done