I have used another extension that doing the same thing, it's a commercial extension but it's working fine so it's worth the money.
EFSEO works with every Yootheme template that I have tested. I have a membership from Yootheme and have tested it several times.
You have not contacted me via email or the support forum, because you have not really tested EFSEO. If you had, you would see that EFSEO also works in Yootheme templates. And if you really got a problem, then you would have contacted me and would not buy immediately a commercial extensions which do nothing more as my free extension.