Looking at the banner, that would require the rounded corners to be inverted and spiked (and the borders would have to be a slightly different colour).
That's probably beyond my dubious artistic skills; maybe one of the actual artists will do something like that for the upcoming forums, but at this point I'm none the wiser. In a way I kinda like that it still looks like Divinity 2's in-game menu; I mean Ego Draconis, not Original Sin, so quite retro now.