Well the new system was fun for me, but the novelty is definitely wearing off now. If this starts to appear in more events then I will be tired of it in a hurry.
It is more complex (therefore interesting) to play than previous events, but I think any strategy is quite limited. We can, of course, choose when and where to use different light sources, but it mostly just comes down to carving a path through the grid and hoping something comes up.
I wanted the daily prize today. I threw 800 currency at it and in spending it I uncovered a total of 4 lost items. Of those 4 the one that offered the greatest chance of winning the daily gave me a probability of 6%. OK, luck will not normally be quite that bad, but there is nothing we can really do to influence things. We're no longer guaranteed any chance at all of even being offered the chance of winning a prize, and when we do get the chance then we can't pick between 3 options to get one that suits.
With the 3 chest system I would know that if I have X amount of currency I get to open a chest. I also know that I can pick between 3 sets of probabilities so there would always be at least one that gave a slightly better chance. Now, they come up one at a time, if they come up at all, and it seems to me that the vast majority of them offer a 5% or 6% chance of finding that daily prize.