By people still working at InXile?
Despite rumors about Saunders coming from mysterious sources, we know for a fact that InXile delayed the game for 1.5 to 2 years because of another game (something that wasn't supposed to happen), we know that they brought in someone who thought the game was supposed to be in the final stages of production after less than a year of development, and we know that they decided to drop a bunch of stretch goals without telling backers.
It's possible that Saunders messed some stuff up, and possible he did a great job and was screwed over. We don't know one way or the other right now. But we can say for certain that non-Saunders InXile management messed up a lot of stuff, so it seems likely that there were a lot of other things they did that we just don't know about.