I've only read the book as well, along with Wookieepedia entries, and watched the Timeline videos before they were cancelled. I personally have to say he's easily one of the most successful Sith. I'd say the 3rd most successful, after Sidious and Krayt. (This is not the same as me saying he's the 3rd Greatest, just in case anyone's wondering) Conquering half the galaxy says a lot, and he put the appropriate amount of planning into everything he did. I tend to find myself siding more with Sith who plan things out and then strike suddenly from the shadows, as they seem to have the most success. Planning and patience goes a long way, and I think its when a Sith is able to master these two things that he can attain mastery of himself and his power. Yeah the planet thing...IDK, you have Sidious ripping holes in the fabric of space, and he did do something similar to the people of Byss if I remember correctly. I'm not so much against it, as I don't think its was needed for the Sith Emperor's story. It really just feels like they needed to establish him as a Big Bad, so they chose the easier path of having him do some over the top thing, instead of building him up with smaller but substantial victories and actions. And really I just don't understand why they had to make him so...perfect I guess? Like he was this awesome dude from the start. I think the character of Darth Krayt was handled better.