The main issue is the delay in the release of all the information surrounding it. Instead of releasing all of it at once, they broke it up across three separate news posts spread days apart. First, they told us that we need to break down exotics or buy the shards to max out exotic gear. So of course, people started to dismantle exotics for shards so they could finish maxing their gear. Then, they told us that the expansion will allow us to upgrade our exotics to new 2.0 versions which have the ability to get stronger than old ones. They told us that we would need exotic shards to do this, which made a lot of people unhappy because they had just broken down exotics and spent the shards for no reason. Finally, probably as damage control, they released the rest of the information showing that the upgraded exotics start out with higher base stats than maxed un-upgraded exotics. This helped a bit, since upgrading means you're not going from something powerful to something useless until you grind it up again. They will also gain experience quicker, which means the grind to unlock the perks is shorter as well. If Bungie had released all this information together in a single news post, the outcry would be far less than it is. They have also been releasing information through Twitter, information that was never in the news posts where most people will be looking. This division of information is a perfect example of how not to relay information between developers and the community, and Bungie seriously needs to work on improving how they gets the news out if they want to prevent more situations like this.