I mean he left it to a solid coverage Safety in man coverage with a Safety over the top. Both guys messed up their execution along with Lattimore. And while it's more aggressive than just playing zone, the call would have worked if not for poor execution.
And frankly, calling a Mesh concept on 3rd and 15 is an odder call than DA choosing to play man with a Safety over the top.
The argument for that coverage on that play was that Goddard was the only guy hurting you and they were down to their 3rd and 4th WR who had barely played before this game. So they essentially doubled Goddard by putting Harris in man coverage on him with a Safety over the top. Given what Philly had on the field at WR, I don't have an issue with that call. In addition, it's odd to call for a Mesh concept when it's 3rd and 15.