I played it for two hours. If the build is indicative of what it's going to be like on June 18th it's not going to be a smooth launch.
I did have fun despite the issues. When it clicks it's a lot of fun, people were having fun larping in voice comms as whatever faction they were playing as, shouting things like 'GI GO HOME!' while charging, or doing a stereotypical good ol' southern boy accent. 
"I think Call of Duty resonates because it's believable and relatable," Sledgehammer Games cofounder Michael Condrey says.
Believable and relatable...Yep, sounds like Call of Duty