I'll think you'll find that it is the players game. In a constantly evolving game that continues to add new content, the players being to develop ownership through investment. Investment of time and money. By undermining or devaluing that ownership, the developer will run the risk of alienating the player base and the game fails. A game like Destiny will always run a balancing act in trying to challenge and inspire the players through delivering new and innovative content, listening to feedback, and making changes were appropriate. An example of this are the numerous changes to pvp made after the community continually asked for it to be balanced. And excellent example of working to keep the balance in check. A contrasting example is nerfing weapons no one asked to be nerfed and charging some areas more than others for new content. This will only lead to an angry player base who are less likely to continue playing.