Halo was built on the old-school principle of "Perfect Balance". Nothing changes. Everything is static. Destiny is built on the modern day principle of "Imperfect Balance". The idea that there is a checks and balances system of counter moves and counter plays. An ebbing and flowing game of rock, paper, scissors where the player's logic and understanding grows. Changing the meta game over time. Everything has a counter, everything has some mechanic that keeps it in check, but first requires the player to learn and understand it. Build a knowledge base and be observant of patterns. They are fundamentally two very different ideas of how to balance a sandbox. Since Destiny is built from the ground up this way. It works. However, you could never introduce these mechanics into Halo. It would [i]that[/i] game.