I like Hell's Vengeance, but I agree it has it's downfalls. Wrath of Thrune, however, in my opinion, is a best part of it at realising AP's promise: playing as evil character.
It's premise is relativly simple: there is a town captured by goody two-shoes's forces. Party are going in undercover. Objective is to destabilise the situation in town enough to recapture it. There is no bosses and orders, you are free to choose your aproach, as long as you're not bringing all the guards on your head.
And here the fun starts. You have this town on plate, it's leadership, it's security forces, it's citisenship. You can unravel them all in many many delicious ways ranging from coy and silly like seducing one of the city leaders romantic crush to horrifyingly brutal. And there is much consideration about nature of rebellion and civil war. Glorious Reclamation are good and you are evil, there is no mistake in that. But as our good guys confronted with reallity they bring with their uprising: necessity to fight their friends who don't agree with their ideals, necessity to do something with captured prisoners, their confidence is starting to unravel. Antagonists are not "lawful stupid", but their idealism based on genuine good intentions can bring as many suffering in the world as all evil ambitions, which is very interesting and refreshing view on such a story.
All in all, this adventure will require a lot of work from both GM and players, but it can be very satisfying.
Sorry if my review have any mistakes, as English is not my first language.