Got an idea here, I think it’d be awesome if they gave each of us a room.
Everytime we end a game, we’d go back to it.
It’d be big enough for us to walk in and if we wanted to send a message to friends, we can do it using a console in the room.
Our recently/Mostused armour sets would be hung up on walls. This makes the room more distinct as well as other things.
Also our favourite load out would be on the wall too as well as our most favourite power weapon(Roleplaying purposes).
There’d be a bustle-kind of sound going on outside the room to show you the ship is living and that there are plenty of people walking around.
Every now and then, a holographic announcer of the captain would appear (Like Cortana but of the captain this time) to tell you what the going-ons of the ship are today. It’d be random, he’d say things like “Good morning, this is the captain speaking here”. And he’d even give speeches sometimes.
There’d be things you’d expect from a bedroom; A bed, a bathroom, a mirror and even a futuristic TV.
There’d be a nice view too, one of whichever place the Infinity is in.
(Here’s the best part though, the view of the Infinity (ie: where the Infinity is) depends on where you are in the campaign.)
You’d be able to transfer to better and bigger rooms with better views with your Spartan Points, I think that feature is brilliant. You’ll be able to change colours too, but you have to unlock them first.
The TV could be a mini feature where you can view Famous Halo-Web-Series such as Arby N the Chief or Red Vs Blue. Or even general Halo machinimas in particular.
Another thing! You’ll be able to watch Live MLG matches from there.
The console that’s in the room will not only allow you to contact friends, but access the Halo enclopedia and even Halo Waypoint.
On that console will be all the tutorials and tips as well videos to help you learn the maps.
This is where we can customise our equipment and weapons, there’d be a workbench where we do this. Every action your Spartan does to the weapon is visual; When you take a scope off, your Spartan also does that.
Some people may say I don’t want to walk around to do things we have menus for, well the room won’t be THAT big 
The idea of this is to even more incorporate the multiplayer and the Story while making the player feel like they are in a persistent world. It is really good for Roleplaying. Also you get the feeling you are part of the bigger picture.
Also, if you wish to play Multiplayer, it could show a short cinematic of you walking to the War-games deck.
If you guys can think of even more features that can be done with this then please suggest them! 
If we can get enough support for this, then maybe 343 will implement this. That is of course if you guys like it.
Btw, sorry if I’ve made grammar mistakes. Typing on the IPad sucks