I am an SEO professional with knowledge of zf2. I don't see why there could be hassles working with zf2 on seo projects. On the opposite, the flexibility of the framework means you can do everything you'll like seo wise, this is as long as you understand seo. If you are asking if zf2 has seo functionality by default, then the answer is no. You'll have to code it yourself. Remember, zf2 is not an cms, but you can build a cms with zf2.