This is a book I'm really looking forward to.
If you want to really expand upon your Tiffany Aching experience - especially with the Feegles - grab yourself an audio copy of all the Tiffany books read by Stephen Briggs. He brings a new element to the Feegles that is absolutely brilliant.
I think all three of the books are quite good and each has their own personality and focus and they all tie together very well. Same characters, but the plotlines differ vastly...yet all end up sharing a goal: Tiffany learns more about who she is and what she can do. She's not the only one to grow and change, though. We also get to witness Roland and Annagramma and Petulia and Lucy and Dimmity go from flat support characters to fully-rounded individuals who could potentially carry great stories of their own. (Annagramma's "You get away from her!" boffo scene is nothing short of inspired.)
Plus, as we observe the next generation of Discworld witches grow and learn, it makes you think back that Granny and Nanny and Letice Earwig and Miss Treason and Old Mother Blackcap and Old Mother Dismass and Goodie Whemper, et. al. were all young and naiive and unsure of themselves too.
As for the menfolk, many of the witches have been married and still remained a witch. Young Esme Weatherwax was courted by Mustrum Ridcully, who could not have married if he'd wanted to since wizards are supposed to remain single. I honestly believe if Tiffany did marry Roland, it would bode nothing but good fortune for the Chalk...the Hag o' the Hills and the Chalk Baron. It would continue the Aching Witch line.
Nullum magnum ingenium sine mixtura dementiae fuit. -Seneca