Not that there was anything so bad about the current design—it’s just that new ownership continues to rebuild the franchise in their own image, disassociating with Jeffrey Loria wherever possible. Derek Jeter wants to show the fanbase a franchise that looks and operates differently (and eventually, one that actually wins consistently).
Fish Stripes has confirmed that the 2019 logo received MLB approval and obtained a high-resolution image of it. Indeed, the Marlins are making a big change in terms of both font and color scheme. Sorry, you don’t get to see it until the team introduces it on Nov.