Steamer thinks his defense is s***, hence the low WAR.
There is a big debate about that. He's been pretty bad in the past but was better this year, some think better positioning is mostly what he needed. Prior to playing with the Cubs he played roughly the third most shallow CF in the league. Maddon had him playing deeper and his defense improved greatly.
If the Jays analytics department thinks his defense sucks then I'd back off and stick to 4 for 60 something. But if he's near average as some believe then I'd be all over him at 5 for 80.