Yes I did, what a bummer :( There's no reason to keep their costume on now, apart from just wanting them to wear it for aesthetic reasons.
It's not too bad once you reach higher levels. Yes, an extra hundred bucks for sending someone to do something for a day is nice, but at higher levels, is hardly noticeable.
I still use the stone cutter costumes, but not for all the charachters all the time. It's nice when grouping large numbers of charachters in the same place so they are easy to find and send back out on jobs. This way you don't have to hunt for them if your Springfield is Large. I use the one and 2 hour tasks for this....quick drink at the Stonecutter lodge and run the Stonecutter day care. Sometimes overnight too for the 8 hour chore - attend secret meeting. XD