I actually prefer requiredbuilder, because it is better and more thorough at generating dependencies than the makeslapt script is. Yes, requiredbuilder takes a bit more time to do the job. However, I've found it to be very reliable at not generating the "openoffice" false positive dependency that makeslapt has too often yielded for me. Also, requiredbuilder is a lot better for version control than makeslapt is. The latest requiredbuilder can also write a copy of the slack-required file to the directory from which it was called, along with writing it to the install directory in the package tree.
FWIW and YMMV,