IDK if it counts as "wOmAn StRoNk", but Tolkien very much intended for Galadriel to be a savagely OP badass. Doesn't quite come out in LotR because her time has passed at that point (and she intentionally RENOUNCES power) but she'd always been pretty damn powerful. And he wanted to make her even more so in additional stories, he just didn't get around to it.
If RoP makes her into a mow-down valkyrie type of character, that really isn't straying far from Tolkien's intent.