Design assistant should be improved to support wildcard and/or regular expression find-and-replace when renaming.
One of the main use cases is duplicating projects, with tens/hundreds of parts with the the same project numbers to be changed or a common change pattern in the sequential/individual part of the part numbers (regex will allow for these more detailed renaming patterns).
If doing regex it should have a preview stage to check that the output will be as intended due to steep learning curve.
Also where renaming in cyclical loops eg. A->B and B->A (or A->B->C->A etc.) it should support this directly (take care of the intermediate temporary filenames automatically). Currently to do A->B->C->A you need to do A->A', B->B', C->C' then A'->B, B'->C, C'->A as a multi-step process and doubling the amount of work and care required.
When it encounters a problem like multiple files renamed to the same name eg. A->C, B->C it should fail softly and take you back to fix the issue, without losing the rest of the changes / renaming work. Currently it gives an error with helpful details but then resets all the changes forcing you to start from scratch.
