https://www.kotaku.com.au/2019/02/amy-hennig-talks-more-about-struggling-with-eas-frostbite-engine/
actual interview
https://www.usgamer.net/articles/amy-hennig-interview-uncharted-4-leaving-ea-ragtag-star-wars
Tales of developers struggling with Frostbite aren't new. Back when Visceral's Star Warsgame - codenamed Ragtag - was shut down, a former employee told Kotaku that the engine was lacking basic functionality in Uncharted 1's toolset:
"It was missing a lot of tools, a lot of stuff that was in Uncharted 1 ... It was going to be a year, or a year and a half’s work just to get the engine to do things that are assumed and taken for granted."
actual interview
https://www.usgamer.net/articles/amy-hennig-interview-uncharted-4-leaving-ea-ragtag-star-wars