Sure, Happ and Suzuki aren't going anywhere, but they're basically only producing league average numbers at the plate, and Happ's is OBP-heavy (which is obviously good, but the biggest problem - as you stated - is a lack of SLG). Also, if Madrigal is who he was for the last stretch between injuries, then maybe he's fine in the lineup, but again, it's without any real SLG at a position where you need SLG. You need to be shopping Madrigal for someone who thinks they need his contact bat in their lineup.