We got back on October 18th. I was surprised at the difficulty I had in making/changing ADRs in the weeks before our trip. While on our trip, we had to cancel two TS dinners because our kids were off kilter after a delayed inbound flight and not getting to bed until 2:30 a.m. I could not get a new ADR for any place we were interested in, not even Kona Cafe.
It was fairly crowded in the parks. We did not get turned away from The Plaza in MK, and on another day at lunch it looked like they were taking people at Rose and Crown. I can't really speak for other places.
We didn't have any issues with servers on the plan. The only problem we did have is that our DD is a month shy of three but looks four, so often we got charged for her at a buffet even though the ADR said she was 2. I was thrilled when I noticed that we were not charged for DD at the Princess lunch at Akershus even though I specifically ordered her a bowl of pasta because she was really hungry.
We didn't ask for anything out of the ordinary, so I can't answer the question about smoothies. Sorry.