He's played 4 games without Watkins?... Watford, Newcastle, Brentford, Norwich and he's got 3 goals in 4, admittedly thats v weak teams and one was a pen but I'd want to see him up top with Coutinho and Buendia behind before judging him.
He's gone from a perfect strike partner in terms of awareness unselfishness and link up play in Che Adams to a nightmare one in Watkins who doesn't have that ability at all.