Here's a theme that feels more at home on OS X El Capitan with large text. Based on the OS X Yosemite theme that come bundled with Alfred, it uses the system font (San Francisco) with a nice, comfortable font size and fits in nicely on El Cap. Check out OS X El Cap Large:
Two-click import: first go here to my website, then click the link to import. Sorry for the trouble - the Alfred forums don't seem to allow linking directly to the alfred:// url to import.