Secret Empire #7 is a tremendously strong issue, with remarkable character work. A reboot seems increasingly likely at the end of this journey, though.
Here's the challenge facing Darth Vader: In the aftermath of Order 66, his challenge is to find a living Jedi Knight, defeat them in battle, and claim their lightsaber for his own. Just a few weeks ago, it wouldn't have been hard for the Sith Lord to find and kill a Jedi. Now, though, Jedi Knights are few and far between - slaughtered by the Clone Troopers at Palpatine's command.
"The Screaming Citadel" is clearly heading for a tremendous, satisfying climax, as the whole team is loving bringing Gothic horror to the Star Wars universe.
Although this issue of Secret Empire has powerful symbolism, it also has an inescapable sense of being filler. It's all about moving the pieces into place for the endgame.