Delightful news, I had a chance to smash the two viewports' code together, and with a few tweaks, it's working fantastically! I want to do some more testing yet, and I think I'll add a property or two specific to this iteration of the zoom/parallax combo, but I imagine it should be out within the week :D
Hello! Thanks so much for your interest. Honestly the parallax+zoom viewport has been sitting around on my computer in an almost-completed state; I just need to finish adding some examples and make a page and screenshots for it. I appreciate the prodding so I can bump it higher on my list to just get out! I'll aim for this month so it's not just sitting around gathering dust.