to keep this game unique, i think we should stay with the RPG theme the game has.
what RPG stuff i'd like to see:
have the dungeons contain multiple floors.
each dungeon will have a boss at the end.. maybe a sorcerer king General/Lieutenant.
have the dungeons be easy at the beginning but get progressively harder by the end.
allow the player to exit the dungeon anytime, but the quicker you do, the less the reward.
you only get one chance at the sorcerer king boss.
the doomsday counter goes up if you exit too early.. either by 10 if you exit just the first couple floors.. by 5 if past the halfway point.. doesnt go up if you make it to the final floor.. goes down by 10 if you beat the boss. if the boss defeats you, the doomsday counter goes up by 10 IN ADDITION to any other doomsday counter penalties (like when your hero dies).
the higher the doomsday counter, the tougher the dungeon.
apologies if something like this occurs already.. i havent seen anything where there are MULTIPLE floors for the dungeon.. just single floors.
more emphasis on dragons:
have the dragon be kind of like a dungeon boss, except it's outdoors. have a whole section of the map be a theme - or realm for the dragon (kinda like how each of the gated areas of the campaign have a theme). each dragon realm will contain uniquely themed mobs and environments.. so maybe a frost themed dragon, shadow themed, cold, lightning, etc.
to access the dragon realms, you must construct a relic which will open the gate.
each relic recipe can be found in random chests on the map, as a quest reward, or in a dungeon.
the crafting components for the relic can be found primarily in dungeons or as rare drops in chests.
sometimes if the sorcerer king is "generous" he might offer a relic recipe or relic crafting component as a "gift". if you accept the recipe, the doomsday counter will go up by 10. if you accept a crafting component for the relic, the counter goes up by 5.
if you kill the dragon, it will cause the doomsday counter to go down by 10.
if the dragon defeats you, the doomsday counter goes up by 10, IN ADDITION to any other doomsday counter penalties (like when your hero dies).
the dragons get tougher when a crystal is destroyed. the difficulty only goes up a small amount if the crystal is outside the dragon's realm.. however, the difficulty goes up considerably if the crystal destroyed resides in the same realm as the dragon.
each dragon has its own set of gear to collect. you get the recipes right away, but you can only find the crafting components in the realm where the dragon presides.
update: there is only one dragon realm per playthrough which is randomly generated. this is to create some variety and some replayability.