Titanfall 2 – What is the Maximum Level for Guns and Titans?

For Shapes:

• Large orange circle: An enemy pilot

• Small orange circle: Enemy AI controlled entity (other than titan)

• Orange arrow: An enemy titan

The rest of your questions:

A whole 1/8th of the circle can be colored in the enemy color (orange). What does this mean?

This is if there are shots being fired within a near area by an enemy.

Sometimes, a faded orange circle will appear around a section of the map, which may or may not have anything to do with map objectives. What's this for?

In my experience this is where enemy spawns are happening for the current time. The enemy can see this too. Played a game of Pilot vs Pilot last night and the enemies only showed up there.

Lastly, sometimes the outer ring of the radar has solid colored in orange sections. What do these indicate?

This is similar to the shots being fired but further away from your current location.

Are there any other indicators on the radar that I have forgotten about or haven't seen yet?

I'm not sure what you mean by diamonds. So I haven't answered that. Other than that I think you got them all.

The epilogue of the fight really only matters for the losing team to gain a consolation prize. Where-as for the winning team, it's similar to the Team Fortress 2 humiliation period at the end of a round.

During the Epilogue, the evacuating team have an attempt to earn an additional Merit (EXP for Titanfall 2) if they manage to make it back onto the drop-ship and survive the encounter. Everyone at this point cannot respawn anymore, so any attempt to pick off the "victors" of the match will help improve the chances of a successful evacuation. (ie, If the enemy team has less high powered weapons, they'll very likely be unable to destory the drop-ship.)

On the other side though, it does not seem the winning team has much else to gain from preventing the evacuating team from escaping. From experience, it seems that kills during this round will still count towards one's progression, but I have not noticed any merit points for a team kill or drop-ship destruction.