Obviously we all know that farming for gold is extrememly boring and a waste of time, so I suggest we change the system for preparations. Rather than being able to spend any amount of money on preparations and having it come out of your gold reserve, have a cap on the amount of gold a player can spend on preparations at any time, and not have money spent on preparations come out of your bank. The gold cap would change based on the difficulty of a dungeon, as well as, possibly the number of dungeons a player has cleared or something. (mabye classes for each dungeon). Although if the latter was enabled it would encourage something similar to gold farming, it would still prevent players from having to repeat the same few dungeons for gold farming. Now this would lead to a large increase in the gold reserves each player had, but this could probably be avoided by making all the buildings much more expensive, as well as the cost of adding more slots for preparations. Plus, we could have a way of paying for more locker slots, so that people still have something to spend money on, and are pleased that we have more locker storage.
This suggestion is probably a bit rough, but as a whole I'd like to see it implemented in some way, since gold farming isn't fun, but the only reason I play this game is the because Desktop Dungeons is fun.