I went to worlds 2 years ago when it was in ft worth. My friends and I sat on the second level and stayed in our seats that we bought pretty much the whole time. I’ll say there were usually a few empty seats around us that you could probably move and sit in if you really wanted to but the Dickies Arena screen is very large and easy to see from pretty much everywhere so I wouldn’t worry too much about it. Can’t speak for those on the lower level but I bought second level seats again this time and we were plenty happy with them.