For editing, what generally matters is RAM and I/O. That looks sorted.
Once we get into motion graphics and the like, it depends on their workflow. I only know After Effects, which is CPU and RAM focused. If that’s what they’re doing, they look set on that front, too. Edit: though, I wouldn’t necessarily recommend After Effects for that computer. Boring details upon request.
I get 100 megabytes/second read and 75 write on my networked Synology. That’s fast enough for me when it comes to “offline” storage.