More of an observation rather than a question:
After adding the BETA 2 updates I had issues with IE11 getting the overlay timeout message. Clicking the chevron page cleared the overlay and then rendered the DFFS form correctly. Chrome worked just fine.
After a little debugging I found that the SPJS-Casc.min.js library threw an exception (Uncaught TypeError: undefined is not a function: spjs.casc.hideEmpty). Chrome just ignored it, but IE must have gotten hung up by it. I had SPJS-Casc_min.js v3.27 deployed. After upgrading to SPJS-Casc_min.js v3.30 the issue was resolved.
Great work Alex….