I'm starting to think recruiting 3 stars for your system who may actually stay 4 years, and filling in with transfers may be preferable to investing time and money hoping for a 4 or 5 star high school kid to sign and transfer out after a year or two.
Re granting waivers. If the school let's the kid know that transferring might be something to consider, sign the waiver. If a kid just wants out to go play for a different in-conference program, its ok to think about whether or not you want to sign the waiver.