Here is an idea that would add an entire new gameplay layer accessable to veteran players and build specialists.
Champion Challenges
It starts off simple enough with our usual list of "Angel of X" challenges
Let's walk through the idea with Angel of Berserk
A veteran player has been able to beat AoB on HNTR, HMP, N! and finally wraps up his final difficulty level for that challenge by beating UV.
Well that earns him a medal, which we'll call the "Berserker Medallion". But that's not all. It unlocks a new challenge called "Champion of Berserk".
This challenge is 100 levels under the Angel of Berserk rules at either UV, N! or a modified difficulty level. Finishing this makes a player a TRUE CHAMPION of Berserk, which would probably include another unique medal and ultimately a badge series devoted to how many Champion Challenges you can complete.
Now from the start, even a fresh player should be able to read about Champion Challenges under the Challenge Game menu because there would be two columns, but Champion Challenges would always be greyed out until the Angel level has been completed on all difficulty levels. The challenge screen for a relatively new player with only 3 challenges open would look something like this:
Angel of Berserk | Champion of Berserk |
Angel of Marksmanship | Champion of Marksmanship |
Angel of Shotgunnery | Champion of Shotgunnery |
Angel of Light Travel | Champion of Light Travel |
...and so on
Not sure what to do about Ao100 - Champion of Eternity?
Anyway, I think if the gameplay were extended for veteran players in this direction, it would keep me coming back for a looooong time. That and it would give me a reason to do things like AoMr on HMP and other various challenge levels I wouldn't normally think about.
Maybe this would be a great time to direct your attention to my old bounty about Former Elites in those Champion game modes...:P
Let's see if we can make this in to an idea that works!