I think it would be neat if random bonus events would pop up occasionally on the game. Examples:
1 or 2 hours of 2x exp
1 or 2 hours of 2x stackable drops
30 mins of 2.5xp
30 mins or 1 hour of ADDITIONAL random hotspot, aside from the one already in place.
30 mins of no burning fish, of no failing spells, of not failing to pickpocket
Stock Market Crash - items available to be bought in npc stores are at a 50% discount for 30 mins
Chicken Hunt - Chicken npc spawned in random area of wilderness, runs all over but expires in 20 mins if not killed. Drops various valuables
There is an infinite amount of possibilities for these random bonus events, but I think they would add a nice twist to the game