Jason,
The main thing to consider here is time and effort for return.
The personal profile is doing nothing to assist the business. A brand page can be leveraged fairly easily if the page will be updated.
A simple blueprint for success:
1. Update the local pages once in a while, focus on quality content in posts.
2. Do the same with the brand page.
3. Share local posts from the local G+ pages on the brand page.
4. Grow the followers on the brand page, to get engagement.
What James is saying is spot on, as a social network G+ can be excellent for engagement (as high as 600%) but the real gold is in the semantic SEO effect.
When you have an engaged G+ page that has content which is relevant to the business and also to search queries, then local and organic results are lifted.
So, therefore, if Local SEO is what you are after then you may want to give this a shot.