Beginning with Frostwire 6.0.0, upstream has started using libtorrent via custom Java bindings (jlibtorrent) so the package is no longer architecture independent and is officially only targeted at x86_64. My main concern is that the source for libjlibtorrent.so is only provided in the form of a Github repository without proper tags that correspond to Frostwire releases. The latter contain a pre-compiled version of libjlibtorrent.so which I'm not comfortable shipping as-is. With the above in mind and what I perceive as very limited use of Frostwire by Arch users, I'm going to move the package to the AUR in a few days unless someone wants to take over and update it to the latest version.