There's a lot of third person animation mods for Skyrim, and even some for F4 already too. The Creation Engine provides no way to import first person behaviors, only third. Snapping your fingers to cast a spell, for example. You can find many mods that add a change in first person animations. Oblivion, running the same engine, also gave the ability to do so.
New Vegas ran on the Gamebryo engine, which you could import first person behaviors properly into. You'll notice he makes custom made animations ported straight into New Vegas. The Creation Engine is a piece of ♥♥♥♥, that's the short answer.