We all know and love the legendary medals such as perfection or extermination. I say they add more of those kinds of medals rather that the stupid ones like comeback kill, vehicle kill, headcase, reload this, protector, vehicle destroyed, vehicle destroy assist, distraction, EMP assist and lots of stupid objective based ones like in KOTH or Dominion.
I say that there should be “Task based medals”
Here are a few of my ideas.
Hat-trick- Score three times in a row in a game of grifball.
Weapon Addict- Obtain 15+ kills with the same weapon. (Melee/vehicles do not apply.)
Bully- Win a match by only killing the same player.
Knucklehead- Win a game of free for all by only using your melee.
Tough love- Have the most amount of assists on your team.
Energized- complete any kind of match without stopping (This means you cannot stop moving, no crouching only using the forward stick and your aim to move around)
This one is not ideal for snipers.
One man army- (Warning this is the most difficult one, this medal can only be activated if you are severely outnumbered so if everyone on your team leaves in a 4v4 match and it becomes a 1v4 match you can earn this medal) Win any kind of match whist outnumbered and without dying once.
There are some of mine, let me know yours 
Also bring back all weapon spree medals.