After the horrible Thief Gold, I had my expectations set at rock bottom, with any enjoyment being derived from the game being seen as a luxury, seeing as how more than 2/3 of Thief Gold were devoid of enjoyment. I'm happy to tell you that this game does not at all follow the direction of the later levels in Thief Gold, if anything, it mostly stays as far away from that as possible.
At a guess, I'd say about half the missions in the game do not have a loot requirement at all, which instantly removes the frustration of running back and forth through a level for literal hours looking for loot, which was what took up most of my playtime in the first game. This game has a much stronger atmosphere than the first game, and the increased focus on completing objectives, rather than scouring the maps for loot, really adds to that effect. This game has some solid mechanics and enjoyable levels, and is overall a pretty good time. If you absolutely despised Thief Gold, don't be afraid to try this one, as I can tell you that I only got stuck and frustrated twice in this game, and those were mostly my fault.