...or any other tile that creates a list, for that matter. It seems like allowing admins to define how long those list can get would be a no-brainer.
Unfortunatley there is not currenlty a way to change the number however this is on the roadmap as there is an open improvement for the feature JIVE-74737:
JIVE-74737 Latest Blog Posts tile: Control quantity of items displayed
I do not have an ETA on when it will be released but our Products team and Engineers have been made aware of the request.