I will be changing the design ASAP. I was using wp-svelte theme and today Dustin contacted me. So I must find another clean and minimalistic theme, I believe.
I'll pick up the mantle and use wp-svbtle on my blog.
Unless I'm missing something, ASAP would have been in about 10 minutes. Changing a theme is just a matter of selecting it in the WP admin interface, if it's installed. Worst case you have to download a theme, unpack it into wp-content/themes, and add it to your git repository before pushing it to heroku and selecting a theme.