Hm... I thought there was text in chapter 2, but all there is is the book at HQ, "It relieves you to know that shadowlings rarely venture aboveground..." so there is a reason, though not necessarily sunlight so my fault.
There have been hints around the story of shadowlings taking a step further and actually feeding on flesh (Main to Niven in the Academy storeroom: "Better than eating the students I suppose") As for the creation of slaves, I meant certain vampires could create mind slaves, albeit by a hypnotic stare instead of a bracelet so I'll drop that one too.
As for Twilight ruining the vampire, there have been scores of different versions of vampires. The first vampire to be in a literary work was Lord Ruthven in the Vampyre from 1819, who possessed: superhuman strength, shape-shifting, control of vermin and wolves, and was not hindered by sunlight or garlic in any way, if he was hurt during the day however, he would have to wait until night to heal. Even everyone's view of the original vampire, Dracula from 1897, was not destroyed in sunlight, he simply couldn't use his more powerful moves (including shape-shifting). Today's accepted vampire (garlic hating, destroyed by sunlight, burned by crosses, turning only into a bat, no control of vermin) is more based on Nosferatu, from 1921. Vampire powers have switched from generation to generation and will probably shift again sometime in the future.
Now for the mind attacks, is four across the team enough or would people like to see more energy draining moves?