The fun associate with this game, or any game for that matter, comes from progress. When players feel like their progress is significantly slowed and stopped completely, that is when the player base typically falls off. Titan fall lost its player base rather quickly for that exact reason. It was an extremely fun game, but there really wasn't any reason to play it as resetting your progress (similar to prestige in COD) provided the player with nothing of significance. There was absolutely no reason to do it. (I stopped after the four time for that reason.) Vault of glass, crotas end, kings fall may be fun the first couple of times, but no player would come back week after week and play the EXACT same content if not for the loot drops. LFG sights for crota's end and VOG are empty for that reason. (Exception to NTTE quest.)