The whole reindeer thing is fundamentally flawed. Whilst I fully understand the concept of spending diamonds to get something that one wants, I have yet to meet anyone who is happy to spend diamonds to get a bunch of random stuff, more than half of which is neither needed nor wanted. A far better use of 3k diamonds is to simply buy extra stars when the daily special is something worth having. This will also increase tickets and thereby the number of grand prizes.
I also concur with many others regarding the shuffle function. Ever since the events first appearance, the shuffle has been a major irritant and after so many bad experiences over the years, is the sole reason why I never spend "real money" on this event on the live servers. I tried using test diamonds again this year on Beta but nothing changes. Quite a large spend resulted in a bunch of unwanted stuff, many inopportune shuffles and an overwhelming sense of having been cheated yet again.
I have said it on here before and I will probably have to say it again; offer something with "game changing" effect at a reasonable cost and I will happily throw money at you. Offer me the slim chance of "being lucky" - lol and I will just turn away and spend my money elsewhere.