Halo 5 if you will do your best game I think you should first have a great graphics engine and many more scenarios were realistic wildlife, with times varying climatic and meteorological, more interaction with the environment in which these, for example if you shoot a silver destrulla or damaged in parts something that shows it is not just a texture details in the armor are more normal realitas more that look futuristic but not so outrageously futuristic as they were in halo 4 and the in maps that you can interact and halo 3. also something that I think you could do is a more beautiful and interactive menu because it is something you always are going to see more and to put the game, for example if it is day or night the atmosphere in the menu but change everything.
I had a difficult time interpreting exactly what you want, but it sounds like dynamic weather and better damage on textures when shot.
I would love to see the environment react more realistically to gun fire and inclement weather on maps, both for aesthetic purposes.
You want a high graphical detailed game? if you haven’t seen Halo 4 already despite the let downs, it had beyond spectacular graphics, we can pretty much say Halo 5 will follow in that string.