Good point mentioned this one here too about the lower skilled players, etc. to attract bigger mass of players.
And my stunning idea of a lore that supports this, nobody seems to jump on but me.
In short: like Hearthstone, do a monthly ranking - class or weapon wise. Then, the person who's leading this ranking has special colored projectile trails and explosion colors. All former "champions" (yes, I'd call it the championates) keep forever that specific color to weapon/class and maybe even a glow to the armor or similar.
Triggers eager to achieve, voyeurism. It's just too cool, right? ... Right? =)