Darth Vader is scarier than he used to be. While he’s always been intimidating, knowing that he was once a little kid who built C-3PO hurt his threat factor. For a while. Rogue One, arguably, changed that, melding the prequel and original trilogy versions of Darth Vader into a Force-powered walking tank of terror.
Source: io9 – This Star Wars Short Turns the Battle of Hoth Into a Vader Rampage Worthy of Rogue One