Campbell also believes Eddie Nketiah needs to leave the club temporarily to secure some first-team football.
“Nketiah grabbed a great assist against Southampton and Mikel Arteta is just trying to find the right balance,” he explained.
“It really is difficult. I think Nketiah needs a season under his belt playing regular football.
“It is one thing coming in now and again at Arsenal but you never become seasoned that way. When you play week in, week out you learn so much more.