My example is: Find a directory named with 5 numbers (leading zero) in root level (1) or level 2 of directory tree on harddisk with 30000 folders and 200000 files.
The filemask will be not even simple: 0????;|*a*;*b*;*c*;........ *_*; ...... and to limit the directory depth is impossible.
So I think, optional use of Regular Expression Syntax in filemask and optional limitation of search depth will make "Find Files and Directories ..." more powerful.