We currently offer a suite of SaaS applications that are priced and packaged separately. What are some of the best practices to pivot towards a "business platform" based model as opposed to the current "business applications" based model?

This is a really good opportunity to take a step back and look at your platform from the eyes of your customer. Are there groups of products that resonate with similar audiences? Or maybe they all drive toward the same goal? 

I'd recommend doing some deep customer research, both with current customers and people generally in your ICP. You want to understand how they view your products, the value they'd perceive if you were to group applications into more cohesive packages and what they'd want to know before making a purchase. You can do a lot of this yourself, or you can engage a pricing and packaging agency that will help guide you toward pricing and packaging best practices.