Well, most peoples out there will say that this suggestion is a rip off Guild Wars 2, but, the idea is really good, the system works, and you does not need a party or guild to complete, all you need is other players doing the same event aswell.
If you does not know what I am talking about, then I’ll explain.
Event is a system from the said game above that somewhere in the map may happen something where players can help solving in exchange for nice rewards.
Does not know what I mean? Let-me use an example.
Wonder that you are running through the fields, until you see a farmer calling players, and the farmer asks the players nearby to collect apples from the apple trees and give to him, then you have to hit the trees to drop apples and deliver them to the npc, or by some unlucky chance, fall a monster from the tree to delay you.
All players interessed just need to collect apples and give to the farmer, and after the farmer get enough apples, the farmer rewards all players who participated the event with exp, coins and items or equipments depending on how much helpfull the player were.
Sounds interesting? What about this:
You are walking through a mine and then hell portals appear, you and the other players have to destroy the portals and the demons that spawned from it, upon destroying all portals and monsters, you receive exp, golds and items rewards based on the contribution.
And what about a boss appearing on the top of a cliff? You and several players have to defeat the boss, and upon completting everyone gets the usual rewards, plus a gold chest, which have loot for every player who participated and opened it.
That’s pretty much what the Event system is about, you may end up seeying one happening, and you will be rewarded for participating, and the better: No need to make party, since all players that participate will receive their own rewards.
Also, while entering a town or campment, an npc can tell you about an event happening nearby, and mark it on your minimap, so you can reach the position and do it.
Events system would boost heavily the game diversity of progression, even more because will give more life to the game, also would make the game less grindy.