The big issue with her is the same as with Kenobi, Leia, and Vader. We know that nothing of any real consequence can happen. With Reva, she has stated goals (1. Find Kenobi; 2. Ambition to become Grand Inquisitor). Yet we know she can’t be successful. If we suppose she holds a grudge against him, she can’t kill him. She can’t help Vader kill Kenobi. And, though I admit I didn’t know anything about the GI storylines from other properties, apparently it was known she couldn’t end the series as GI. If we suppose she’s motivated to kill Vader as a result of Order 66, we know she can’t be successful in that either. So she’s a villain with no teeth. Unlike others, I think the actress has done a fine job, I just think the character is half baked. Maybe the last episode will do more with her and there will be real concrete stakes for the show. But right now the whole thing feels like an inconsequential side quest.