I've also been curious to see the project download for this one to compare/contrast with our own approach.
Regarding pan zoom: IMO the iframe perspective session load inside the data center demo's SLD page is a deal breaker for me, and the reason I don't use the IA-released pan zoom container available on the Exchange. A good (but paid) alt that bypasses this iframe session load is the BIJC Zoom Pan Container. Zoom Pan Container - BIJC Module Support
Regarding SLDs or diagrams in general, embedded views are your friend. Build a component library of small views that can be indirected at a tagPath root. Don't even bother with pipes in perspective. Embedded views can live on top of a SVG frame, or you can even use resizable embedded views for buswork or other background elements. We often have to flip flop between Figma and Perspective for SVG backgrounds, a major headache in our current workflow. I'm hoping the 8.3 drawing tools replace this need.
We have a utility project which parses another project's filesystem and view json, then converts embedded views into view canvas instances. Once your embedded views are created via a single view canvas, you are suddenly unbound to the actual view that's rendering your diagram, and you can further indirect or dynamically generate your diagrams including SLDs. It's quite powerful.