An Alternative? to parsers..

[Ceasaria]

Perhaps include a rewards system to help enforce the idea that if your playing with people especially strangers that doing your best is best for all. C 1 point, B 2 points A 3 points with S granting 5 points possibly to spend on glamour items, minions, mounts, untradable consumables, titles etc

I think this is a good thing because it will incitate people to play better.
The mentor system would be useful too for this.
Instead of having mentor asking in dungeon for this player to do better by giving him some tips, this player will ask for advices like :
"Hey, I have always C rank in dungeon, can you help me to do better ?"
"Yeah, of course. Use this and this...don't forget that..., etc. If you want, you can check this guide 'link', it's sum up well how you can improve yourself in dungeons..."
"ect"

Dungeon is the first gate to really improve ourselves.
When it will be done, then we will see the players level rise, which will conduct us to see the same about the content propose by SE.

Of course, not everybody would care about their rank, but when you see constantly you don't have the best rank, I think with time, you will give a try to play better.
It's a goal given by the game, it's explicit.
Furthermore, it would maybe easier and acceptable for some players to be evaluated by the game and not by other players (with ACT and other things).