This is an interesting idea. I have some machines that can be a bit temperamental, meaning they could crash during a save during batch process. If I have a .psz with 10 scan in (1GB file) and I ahven't backed up after each batch process and it crashes during save, loss of work : (
Or even better the ability to save out individual .psz scenes as it goes through the batch. As saving a 1GB file after each process means the file grows and grows and the save takes longer and longer after each Chunk process.
Increment save option is a good idea though. _01.psz, _02.psz or what ever