Hah I knew I would find a thread about Filcher here. I just played for a couple of hours.
What I really liked about it is that it addressed the elephant in the room when it comes to this flavor of stealth games: the fuckup cascade issue. This gameplay shines when we are in the flow, exploring cautiously, making progress, etc. Then we make a mistake, go back in time a few minutes, and the satisfaction and reward of the experience diminishes because we know what lies ahead. It's the kind of incongruent design that's difficult to tackle. Like Sonic games, where you have to go fast, then get punished for going fast with spikes.
I say they tackled this by removing saves and making the levels shorter and a little easier. But then as the campaign progresses, the levels start to get longer and harder and we end up having both the original problem of Thief compounded with the frustration of having to restart from the beginning every time.
But it was fun.