package review: Is it a must to use system libraries ?

Hi all, I've been working on review of bsnes [1]. One of the issues raised before I began was the upstream source includes some libraries, some of which are already packaged and included in either fedora or rpmfusion. Since I'm not an experienced packager or reviewer, if there are other reviewers who believe further work should be done on the "use system libraries" item, can you please speak up now ? Cheers, DaveT [1] https://bugzilla.rpmfusion.org/show_bug.cgi?id=15