Great video review you linked to, here.
I have a Creative Cloud subscription because much of my professional work requires AfterEffects, Audition, and yes, Premiere Pro, so the limitations of only three exports and the Creative Cloud storage for the free version of Rush don’t really apply to me. I do, however, bristle at subscription apps, and if I didn’t need CC for my living, I almost certainly wouldn’t be subscribed to it.
Based on the name, I’d say Adobe Rush is designed for when you’re in the middle of production and need to assemble the “good” takes into rushes—also called dailies—for the director to review before each day’s shooting begins. That you can add titles and basic color correction is useful for rushes, and the fact that you can then open the Rush file in Premiere Pro is very useful, allowing you to just immediately dive in to refine the edit you’ve assembled early on, and use the full CC suite of tools to create a professionally finished product.
BUT, Adobe seems to also want to position Rush as a tool you can use to create social media posts. And while you can use it for that, it’s very limited in comparison to LumaFusion. Rush is a decent entry-level video editing app on iOS, but its limitations (max of 1080P output, one video track, inability to import Luis, incompatibility with the iOS Files App, and the requirement of a ten-buck-a-month subscription) makes it uninteresting as an iOS-only solution.
There are a few things Rush does that I’d like to see incorporated into LumaFusion — animated titles being the biggest one. Rush would be better if you could create your own animated titles, and maybe you can (most likely in Premere Pro on the lap/desk-top), but if you can, it’s not obvious how. But even having a series of animated templates would be helpful in LumaFusion.
After looking at it in some detail, I’m not convinced of its usefulness—at least in its first iteration. I suspect they’ll improve its capabilities, but I think they’ll continue to hobble it, because they really want you to subscribe to Creative Cloud to finish in Premiere Pro, and why would you pop for the full fifty-five or sixty dollar-per-month CC if you can do everything you need for social video on your iDevice?
LumaFusion is definitely a better end-to-end tool than Rush.