post rotj's problems is the main character can't die. from rotj- solo command(i think that's when coruscant fell) the story is about the rebels establishing legitimacy, then branches off into looking for more jedi... or fighting imps and kidnappers. normally it's both imps and kidnappers. then the young jedi knight series which focuses on the solo children again(kidnappers were after solo kids). then we get to njo after countless books about legitimacy and recruiting jedi. and people die. it's something completely new, main characters die, luke han and leia take a back seat to the next generation. then dark nests throws it away. and legecy even further but killing off anoother major book character. and fotj just continuing Legacy's pattern.
There's no suspense anymore in post Rotj, either kidnappings occur, or luke eventually goes in and kills everything and you know he can't die.