I agree- but even better than a shooting range, how bout a Halo Forge in Destiny? You could be able to choose a patrol or PoE map, and then customize the enemies, light level, and modifiers to improve your skills. If Bungie is worried about balance, they could make it practice only with no Rep (dick move), but it would still be fun to work with. Even better, you can argue that it will solve the lack of content in Destiny because the players are making and playing the content that they want. Want a new exotic quest rather than just grinding RNG? Make an exotic mission. Want a mission to explain lore? You could do it.