Most duplicate Linux programs of already native FreeBSD programs are better off being dropped. Keep the plugin or other emulation, and improve it to run on top of native FreeBSD programs, with the freed up resources from dropping duplicate Linux versions.
Linux emulation is better off being for when a program becomes newly available to FreeBSD, until it becomes natively ported. emulators/linux-f10 and dependent programs can already go, since that port has been replaced by emulators/linux-c6.
I wonder, what if so many improvements will bring the wrong crowds or attention? Maybe it won't and possibly more good can be done than bad?
Your suggestion does not really fit this thread that is about FreeBSD as an operating system. All of the Linux software in FreeBSD comes from ports that is not part of the FreeBSD operating system but is contributed third party software with people who often have no direct affiliation with the FreeBSD project as maintainers.