This is all well and good, but the JP1 and 3 films do not support this, the skeletons found in the ground by the film paleontologists are obviously based on Velociraptor as it appears in the film, not deinonychus or velociraptor.
The animal pictured is larger than a human, has pronated arms, and a fabricated skull. As of the third film they have an additional lambeosaurine resonating chamber, that (In-universe) is so perfectly replicated it baffles Ingen raptors. Real Dromaeosaurs do not have these.
There is no particular reason to believe that the Jurassic Park velociraptor is an inaccurate reconstruction in-universe other than fan explanations, at least as far as I understand. The Wu quote feels almost like a weird fourth wall wink that doesn't add up, then again there's a ton of things in this franchise that don't add up without fan theories.
All of that aside it is because of this it does make sense that deinonychus in the franchise would have a radically different skull than the ones we have IRL.
The JP franchise has a completely different paleontology. Alan Grant correctly describes velociraptor hunting patters and Tyrannosaurus eyesight before knowing that there are live dinosaurs on Isla Nublar. Neither of these are corroborated in real life. While the book might have had these as impacts of the Frog DNA the films adapted it into the world's history.
TLDR: I can buy that deinonychus looks like that in the JP lore, but frog DNA is probably not the reason. Frog DNA, in the films, was only used to explain breeding, and the idea that it affected their physical appearance was defied by the films themselves until JW
Side note: Yes, most accurate depictions of dinosaurs are "speculative", but considerably less so than any depiction that actively defies the bones, such as the Deinonychus we have here. It's understandable why people would be annoyed that the Jurassic World deinonychus doesn't even share a skeleton with its real-life counterpart, they might wonder why it's even called a deinonychus.
I actually kind of like the lizard chicken