I thought beforehand that hunting boxes would not be that interesting, but this escalation is extremely well done in my opinion (even though there are some bugs like the objective in level 1 being called level 3, and the thing pointed out above). I was determined to do it without knockouts just to see if it was possible (it is, and not that difficult) so when the hidden objective popped up, I was surprised in a good way. Luckily, I managed to to the third level in one try, so it wasnât too slow 
I can see why others have problems with the hidden objective, but for me personally it just added to the fun (I had never seen him do any routine in that part of the map anyway besides him beelining to the meeting, so that was an added bonus). Some of the fun is probably due to inexperience with the map, but it is definitely one of the best for now (which isnât saying much, given the small sample size :P)