Sawyer himself said that Poe2 flopped, in his recent series of tweets on why he's currently in a deep depression.
'the games were actually made and implemented'
'actually the game didn't sell'
You do realize both these statements have nothing to do with each other, right?
One thing is a mediocre but well implemented project. Another is wether it sells or not. DA:O is thoroughly mediocre -- and its not even well implemented for what it is -- , but it was the best selling BioWare project of its time. As well as RPG Codex GOTY 2009. Pillars of Eternity 1 and 2 were both well implemented projects. The quality of their implementation, the actual end-result and wether they sell or not to the general public are three distinct things, related towards each other but not determined by one another. An actual good RPG can always sell poorly, and they often did. So if you want to accurately judge wether the developers managed the game well, if their vision for the game was any good and how the market behaved you have to look at these things separately.
Obsidian was always an amateurish studio and making games isn't just having good ideas. You need to decide how far you can go with the man-hours and talent available to you. You have to set up and maintain a pipeline between every work group. Sawyer was good enough at those things that he shipped New Vegas and managed to turn the absolute diasaster that was Ferret's NWN2 into something you can ship without grounds for being sued, eventually leading to something worth salvaging, ie Mask of the Betrayer. If he was a bad project manager he couldn't have done either of those things.
The problem with Pillars is not one of execution. Say what you will about Pillars 1.0 or Patchfinder: Bugmaker, but neither of those releases could compare to the Bugsidian of old. From a technical standpoint Sawyer and co. managed the actual development of the game well enough. Not only did the Pillars ship not sink because of execution, more than that, the game is rather good looking and plays well.
Issue is, its also quite uninspired and that's a problem bigger than Pillars itself. As Obsidian approached being a half way capable company, all the ideas people that made their games notable to the discerning public got fat, lazy and completely disempowered. Avellone was creative lead, but he couldn't speak as an equal to Josh. He was blocked at every turn from rocking the boat too hard and messing with the pipeline. And it is doubtful Fenstermaker could push the Director into taking more risks with the story at all. Even if Sawyer had just implemented a d20 ruleset, both Pillars 1 and 2 would remain 'story driven games' that are really just quite boring. They stand at best as this exploration of what a 'renaissance colonialist setting' could bring to the table, as opposed to regular high fantasy. But not as a cool tale about anything in particular.