What ho,
Something I really enjoy from Diablo 3 are its bonus weekends, when Blizzard will temporarily give you Experience or Magic Find bonuses for a few days. This does wonders to get the community online to play together, and it's a ton of fun.
What if these could be applied to WoW as well? Similar to how the Call to Arms weekend of the past would grant you Honour bonuses in Battlegrounds.
Examples of Bonus Weekend Events:
100% Reputation Bonus across Northrend
100% Extra Legendary Quest Items (such as Abrogator Stones) dropped in raid dungeons
25% Bonus Yield from herbs, mining nodes, fishing pools, etc.
200% Bonus Experience from Quests up to level 90
200% Extra Gold in monsters, loot caches, raid bosses, and rewards
50% Bonus Apexis Shards from doing Draenor daily zone content
The list goes on. These numbers obviously need tweaking, and perhaps some content should be restricted from these Bonus Events to avoid flooding the market with things or breaking any mechanics. Unlike Diablo 3, WoW is a persistent game with an economy and where items more or less last forever.
But overall, how would you feel about a feature such as this? Personally, I think a good Bonus Weekend could make me re-activate my subscription in a dry spot without content, because it suddenly makes a particular activity in game more rewarding and appealing.