Indeed she complained about nudity gender inequality in the show last month and I believe she had negotiated something in her contract to get out of more nude scenes too. But after this episode she said:
"It's so exciting, very tingly-making. Every season I get at least one spine-chilling moment. I just stand up and I go, 'I'm hearing what you're all saying, but funny thing, I'm going to kill you all. I forgot that I have an ace in my back pocket and now I win.' I'd like to remind people the last time I took my clothes off was season 3. That was awhile ago. It's now season 6. But this is all me, all proud, all strong. I'm just feeling genuinely happy I said 'Yes.' That ain't no body double!"
So it was her. Sometimes people say one thing then do something else or the opposite. To be fair though, it was hard to avoid it in this scene when her clothes were burned off and she emerges from the building full-figure. It also wasn't nudity in a sexual context not exploitive in any way. It was tasteful, artistic and powerful -like a goddess- which is probably why she has no qualms with it.