2 great skills but unless you start as Hurthling you can't get cooking (except with potion/scroll of education, or wish) so every cooking set you find is worthless. And unless you play as Archer or Farmer class, you don't get Fletchery skill so every Fletchery set is worthless.
I think it would be cool and not game breaking to have some kind of quest somewhere you could learn these skills. They definitely aren't wish-worthy, but would be very nice to have outside of 1 race and 2 classes.