Use simple text when you want to make changes on your website and don't want to risk breaking your website, wait for your developer or pay everytime you want your vistors to know what you have for them.
Inline editing will make changes too easy not use it.
Always Search Engine Optimized and visitors looking for what you do may find your Simple Text blocks and send send them to your website before they even find your website.
Suggestion: Little harsh, if your web designer/developer reccommends redirecting your visitors to social media for your latest news post, fire him or her.
Why spend hundreds or thousands on SEO just to redirected them to Social Media so they can be distracted by your competitor's advertising? Just doesn't make sense, does it.