A random loot generator that offers several types of loot.  Select size from pickpocket to treasure room.  Select types of loot.  For example a series of check boxes to include say magical items, potions, stones, or just coinage.  And lastly the sweetest feature would be to allow the generator to draw custom loot from an uploadable spreadsheet.  

This could be expanded to a general store generator, magic shop, weapon smiths.  

There are several generators like this out there but D&DB needs its own.

Why stop there. I think creating generators for many features would be incredibly helpful. 

I'd love to see a Generate Treasure and Generate Horde button on the monster descriptions. Being able to roll out a treasure right from the monster description would rock.

Dungeon Generator would be cool too. Or some sort of npc background generator. 

I would love an NPC generator that had some decent attributes attached.  It could be user/fan generated, and screened through up-votes like a background generator that samples a reddit type thread.  Only takes the top 1000 or so.  That would cut down on the "born with a butt for a face" type things the internet inevitably spawns.  

I like all of this, but a loot generator is great. I use the tables from the DMG quite often. Having official support for something a little quicker is right up there.

All of this sounds like possibilities to go into the campaign management. I would like something like this for when you just need to suddenly do something on the fly because well... your players suddenly went left when you expected a right!  ;) Or you are just brain frying on some of the filler stuff in a campaign and just need stuff NOW!

What about a feature on the generator for traps? 

I agree. I was disappointed as a DM That this was not added to make this less a chore during gaming session. 

Yes, they should definitely  have this.