My assumption is that as you increase the level of your guardians(s) you will replay previous missions. When doing so we will most likely raise the difficulty a bit to increase the challenge (read: fun). It was revealed there would be up to five tiers of difficulty for most missions. During the beta it was possible to replay early story segments on normal or hard. I noticed the description for a higher difficulty described the enemies as more numerous and aggressive. My question is this; Does playing at a higher tier difficulty yield better quality or more frequent loot drops? I cannot find a satisfactory answer for this... Would it be a viable strategy to 'push the envelope' for the best gear or are the difficulty tiers more about player enjoyment...?