A: "What other Paradox-Pokémon could we add for Scarlet?" B: "How about Suicune, but it looks very primeval, like it's been fused with a T-Rex with its short arms. Let's turn the legendary beast into a REAL beast!" A: "Fantastic idea! Now what about Violet?" B: "Virizion but as a robot... and call it Iron Leaves." A: "Sure, whatever."
Edit: Just to be clear, I actually like ... that new Pokémon, since Virizion is my favorite of its group. But honestly, the Future-Paradoxes are so much lazier designed, than the Past-ones. They are the exact same Pokémon just with a robotic style. Whereas the primeval ones, while the concept is the same for all of them as well, their new designs make them stand out from the original counterparts.