I'm also experiencing the same LOW drop rates from the chickens and Santa as others have reported.
I'm still trying to finish the goal asking for cookies from the chickens! It's frustrating to repeatedly collect eggs and not get one single cookie. While Santa has been generous with coins, he is stingy in giving the much-needed leis.
I do enjoy these events, but having a break in between would be appreciated so we can catch our breath. And I'm noticing more frequently that these events have poor drop rates that prevent many of us from finishing. But if the rates could be improved, that would be great!