There's a big difference between "the Empire remains a relevant force" and "it's just the Emperor again" though. A fledgling New Republic dealing with an Imperial remnant force with its own local goals that the Republic is spread too thin to deal with is very different than "if the Imperials ever catch our fleet, we're all dead".
And while the remnants often have something unique that make them a threat to the New Republic, it's rarely a "superweapon" in the sense that the Death Star was one.
Thrawn himself was his "superweapon" and rather than being a weapon of mass destruction, he had highly tailored and specific tools that let him punch above his weight with the ships he had and his grab bag of tricks.
Ysanne Isard had a Super Star Destroyer, but that's just a conventional ship: her real threat was her planning and information-gathering, which eventually led to her master plan of taking over bacta production. Trying to choke out a key military supply is wildly different than anything the Emperor has ever tried.
Warlord Zsinj had a superweapon, the Nightcloak, but it was incredibly limited, an array of satellites that would block out light from reaching the planet. Functionally pretty much indistinguishable from orbital bombardment. Most of Zsinj's threat is his conventional fleet.
Not to say there were no Death Stars: the Sun Crusher is the one I want to call out as being the most boring "well what if we made a Death Star but better". But notably, the Sun Crusher spends very little time in the hands of the Imperial remnant, first serving as an escape tool and then falling into the hands of a troubled young Jedi. So there we have the Death Star, but not the Empire.
My favorite riff on the Death Star was Darksaber, where the main plot was a Hutt finding Bevel Lemelisk, the original architect of the Death Star, and trying to get the minimum-viable-product version of the Death Star, where it's just the laser and nothing else. This is a threat the New Republic has to take seriously and deal with, though it turns out the whole project was a train wreck and it's destroyed the first time it tries to fire the laser to clear an asteroid in its path.
The lack of any of this adjustment is one of the problems with the movie sequels: the First Order is played as exactly the same threat and type of threat as the Empire, with Death Star 3 and similarly overwhelming fleet, and the New Republic is immediately relegated to a background entity so that the good guys can be exactly the same as the Rebels.
There's a big difference between "the Empire remains a relevant force" and "it's just the Emperor again" though. A fledgling New Republic dealing with an Imperial remnant force with its own local goals that the Republic is spread too thin to deal with is very different than "if the Imperials ever catch our fleet, we're all dead".
And while the remnants often have something unique that make them a threat to the New Republic, it's rarely a "superweapon" in the sense that the Death Star was one.
Not to say there were no Death Stars: the Sun Crusher is the one I want to call out as being the most boring "well what if we made a Death Star but better". But notably, the Sun Crusher spends very little time in the hands of the Imperial remnant, first serving as an escape tool and then falling into the hands of a troubled young Jedi. So there we have the Death Star, but not the Empire.
My favorite riff on the Death Star was Darksaber, where the main plot was a Hutt finding Bevel Lemelisk, the original architect of the Death Star, and trying to get the minimum-viable-product version of the Death Star, where it's just the laser and nothing else. This is a threat the New Republic has to take seriously and deal with, though it turns out the whole project was a train wreck and it's destroyed the first time it tries to fire the laser to clear an asteroid in its path.
The lack of any of this adjustment is one of the problems with the movie sequels: the First Order is played as exactly the same threat and type of threat as the Empire, with Death Star 3 and similarly overwhelming fleet, and the New Republic is immediately relegated to a background entity so that the good guys can be exactly the same as the Rebels.
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