Mostly I was behind the table in Artist Alley for the whole event, so my experience of the con was limited. But I have a couple of small things. The biggest one was the the Artist Alley tables needed more space between them so that we could move out from the tables without having to run to the end of the line. There is plenty of space in the convention center to allow for a small space between tables. It really negatively impacts the ability to set up and take down the tables and also to assist customers.
Second, when I was presenting my panel, the staff at the door kept coming in and making the attendees change seats to fill each and every seat in a certain order from back to front. When attendees and finally I told him to leave us alone, he just kept repeating it was policy in case the room filled up. We are mostly adults...we know how to sit in chairs. The room had several empty rows of seats and making people get up and move and sit in places they didn't want to sit is just silly. People have lots of reasons to choose chairs in certain places, and shouldn't be told to move. It's not the cosplay show, it's a panel. Leave it alone. As a panelist, I don't appreciate someone pissing off my audience right before I have to present, especially when it's for no good reason.
ETA: Also he wouldn't let people enter the panel room early and sit down, even though I was fine with it. People are tired and want to sit, not stand in line.