Thanks for the reply philsmd. Yes, I can imagine there will be some issues to overcome but, this would help a lot for runs like this. Hopefully, someone can come up with a solution as would be greatly appreciated 
Hashcat does see any changes in filesize / dates and rebuild dictstat2. If a user went so far as to try and "trick" dictstat2, then thats there prerogative. Hashcat also write .restore files anyway so should be no impact what-so-ever hopefully.
Anyway, hopefully a solution will come.

Hashcat does see any changes in filesize / dates and rebuild dictstat2. If a user went so far as to try and "trick" dictstat2, then thats there prerogative. Hashcat also write .restore files anyway so should be no impact what-so-ever hopefully.
Anyway, hopefully a solution will come.