I agree. Too much thief time.
I am a fairly quick thief and I get impatient . This leads to a lot of unnessicary deaths of mine. But at the same time, 20 really is more then enough time for everyone to complete the map OR die trying. Thats the way it should be. A lot of thieves can sit on their arse and play arround or whatever because they arent worried about time. This can be boring, and its unnessicary. I too experience the second wave syndrom, especially as a thief! Sometimes, with low health, and no pots or items, I was actually relieved when I died. I got all my items back and I get the objective.
I think the time constraint that the devs put on us is reasonable and Its kinda fun to play under new rules. Think of it as a chalange. I like time constraints.