Perhaps some templates provide blog stylization opportunities. But not Helix.
SP PB is a component and does not control the template settings and other components settings.
Joomla Blog is component too (com_content). One component cannot control the other.
The template usually contains only common styles and common settings (in more or less degree) for the entire site (for all core joomla components and core joomla modules).
Small things about which you ask are usually configured only through CSS.
SP PB has three features:
- Creating its own pages
- Editor for Joomla articles
- Module
It can not affect any other aspects of the site.