It's too late in 2020 to make any drastic changes but going into 2021, I think a guy like Davis has earned the chance to push Grichuk. If this was 60 games into a 162 game season then yeah, I think Davis should get a crack at regular starts.
Ideally someone better than either, though. Jackie Bradley Jr. is an interesting FA target to me. Everything depends on cost but a true CF and a left handed hitter is really the ideal complement to a Gurriel-Grichuk-Teoscar incumbent outfield.
Kevin Pillar is a similar player to JBJ and he really struggled to get a job this offseason so maybe there is a chance JBJ won't cost Tanner Roark overpay money.