Having gotten the "Collect the 4th Chest from the Daily Goals" task literally RIGHT after I collected the 4th Chest from my Daily Goals has officially put me on the "this is bad" bandwagon. It seemed a little hamfisted before, but inserting once-a-day, better-hope-you-time-it-juuuust-right-or-else goals like this is purely punitive.
Sure, I could burn 90 kobans to bypass it but watch the newly-refreshed task be "Collect the 3rd chest..." or something. Coupled with the fact that as previously mentioned, finishing the lower-level task doesn't reset BOTH tasks, this is effectively just a trap.
This is a terribly-designed event.
As many have mentioned previously, a combination of factors including goals not applying retroactively, many goals being hard once-per-day gates, the high cost of Replacement re-rolls, and the super-expensive bonus path all combine to make this really both punishing to casual players and a waste of resources to whales.
MAYBE if we were pulling a Mythic girl this would have some legs, but as it stands the rewards for all this hassle are mediocre at best.
I find myself literally afraid to do anything unless it corresponds to a task/goal in this event, because you KNOW as soon as you do it, it's going to pop up as the next goal, and since nothing counts retroactively it's like you might as well have not done it at all. As a result, I'm sitting on tons of natural regens that are topped out, but I'm scared to spend them, thus waiting to get past the current gate so that hopefully this event will decide I'm "allowed" to do something with them at the next step. Then, of course, I've lost that regen forever, thereby adding to the necessity of buying more to catch back up.
This event is pure whale-chumming. It's transparently designed around being a $$$ sink, and a blatant one at that. +1 in the "I am not loving it" camp.