The main gripe I had with the panels this year was that Anime Parliament was buried early on Friday before many people were there. In prior years, this was always one of the highest energy, fun panels when it was in the evening and in a longer block of time.
Other than that, it would have been nice if all of the Industry Q&A panels had been in larger panel rooms. Panel room 2 doesn't cut it for those since it ends up overcrowded.