Sweep to multiple addresses

If you want to take all your funds and move it to cold storage, you don't want to make multiple sweeps just to ensure you have reasonable denominations and that you have distributed your funds across addresses.

A side effect, is that by providing a few addresses (say, 10) you could even make your transaction look like a coinjoin, or you could also decide to make it collaborative but be more than a single sender in that coinjoin (with limits to ensure you are not sybilling others).

Another idea might be to provide a series of addresses and the program will create multiple transactions for you (eg. you have 10 addresses, but you want collaborative joins with an avg of 10 inputs and you should be no more than 2 inputs per transaction).