output which wordlist the password was found in
#1
it'd be great if there was an option to have hashcat output which wordlist it found the passwords in. this would be useful to determine which wordlists have a higher success rate and move those to the beginning of the search.
#2
never heared about such an request in the past. the experienced hashcracker usually knows which dictionaries are good and which are not.
#3
JtR outputs this in it's log, along with the rule being processed.
Both of these are very useful:
1) To know which rules are actually producing results!
2) If there's a crash, to allow restart knowing which dictionary was processed last.

The second is obviously applicable to the oclHashcat-plus "folder" option.
For some time I've had a JtR front end that performs a similar function - incredibly useful for those of us who have divided our dictionaries into manageable pieces... (20MB)
#4
if i ever add something like a .log file, i will add the dictionary name. but just because of that, i will not start with a .log file generator. this would have a huge impact on the source. however, if you want to find out which rule cracked a password, you can use the --debug-mode parameter in hashcat cpu. in gpgpu based computing this information is not present on cpu so it cant be written to an output file.