It does seem extremely odd that they are being so faithful to the 5 footer as it appeared in 1977, with this one obvious exception.
I don't think that's right, if you mean the Bandai 1:72 Falcon has the SE grille. The grid spacing seems to resemble that of the TFA Falcon, not the ANH SE Falcon. Which is even stranger to me.
But hey - I doubt it'll be difficult to get a piece of white acrylic plastic, bend it to the right shape, and slap it in there if you really want to!