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I do SEO for online boutique marketplace. I've been here for about 4 weeks and no one's done there SEO (they've been around for about 5 years), so there's lots to do. A big concern is whether or not to submit a sitemap, and if I do submit one, what's the best way to go about doing one.

We have 250+ products dynamically inserted and sorted on our site daily (more specifically our homepage... yes, it's a long page). Our dev team would like to explore rendering the page server-side using ReactJS. We currently use a CDN to cache all the content, which of course we would like to continue using. SO... will Google be able to crawl that content? We've read some articles with different ideas (including prerendering): http://andrewhfarmer.com/react-seo/
http://www.seoskeptic.com/json-ld-big-day-at-google/ If we were to only load the schema important to the page  (like product title, image, price, description, etc.) from the server and then let the client render the remaining content (comments, suggested products, etc.), would that go against best practices? It seems like that might be seen as showing the googlebot 1 version and showing the site visitor a different (more complete) version.