There are a couple of structural things I’d love to see updated in the Write.as templates:
Meta language tags. Either a full meta tag or a lang attribute on the HTML tag. If the idea is be flexible for any language, perhaps you could ask for a language in account settings to declare the value.
Replace the h1 tag that’s used for the blog title with another tag. The h1 should be reserved for the content titles to improve accessibility and SEO. Both rely on that tag to introduce a page’s content. On a post, the title is far more important as a descriptor than the blog name.