I criticize both Disney and Universal for that. The Navi ride has video screens (a couple anyways given the short length), and I wish there had been a lot more animatronics (i'm doubtful we'll ever see either Disney or Universal build another attraction with anything close to the quantity of animatronics from Disney's classic 60's-90's E tickets).
However I will diverge from your usual negativity to doll out some praise for Navi River. In a lot of areas it reminds me of what imagineers used to be capable of. I've found it more immersive and entertaining than anything WDW has built since Kilimanjaro Safari and Dinosaur. I enjoy the ride quite a bit. It's not some insane and technically sophisticated new E ticket (like Forbidden Journey), but it has an uncompromising attention to detail and artistry I feel hasn't been seen in a long time from a WDW ride.
And to be accurate, unlike Gringotts/Kong/Ratatouille, 95% of Navi River is actually physical. Navi's screens are relatively small compared with the theater sized projection rooms for Gringotts, Soarin, POTC Shanghai and Flight of Passage. They are layered with multiple "cells" and have 3-dimensional depth too (similar to the queue screens for Gringotts and FJ). There are no empty spaces surrounding the screens, they completely framed them with detailed physical scenery. My wish for more animatronics still stands. But truly, I can't really say there are "too many screens" when there aren't actually very many, there are just too few animatronics. But there is a LOT of physical scenery, the VAST majority of the ride IS comprised of real setpieces. They are very detailed too, with perfectly done lighting and no visible backstage elements (no mechanical crap all over the place like in Little Mermaid that shouldn't be seen, they even covered the ceiling with foliage). The effects that comprise the scenes are technically "simple" in terms of how they work, but the ride was clearly designed by talented artists who knew their trade well.
Again I wish Navi River was longer (10 minutes at least would have been good) and had more animatronics. But honestly I still can't help but really enjoy the ride. It has been a while since a Disney ride made me feel the way Navi River has.