A common thread I've seen among many of the iron men I've raided with is an insufficient supply of brews, and seeing how mole is not exactly a great source of crushed nests, I believe that adding nests to the raid drop table would be a great way to revitalize raids and give iron men a new source for brews, or at the very least replenish the supplies they put into the run.
That being said I also think supply drops in general from raids should be looked at, of which I have a number of ideas. I will make a thread about such if anyone has interest in hearing them.