If you’ve been before, how was it? Are you considering going to blizzcon2019? Will many blizzard employees be present?
I've been to Blizzcon since 2014, as an attendee and employee. Every employee works Blizzcon so yes, there are a lot of Blizz employees. Is it worth it? In general yes and especially this year will be exciting.
I went in 2017. It was super boring. Unless you like watching overwatch esports or are a cosplayer being paid to go, it probably isn't worth the time.
Do not go, its a waste of time and money. There isn’t much, just dead games esport stages.