As better as it looks, the geometry would most likely cause the frame to bend, hence why it's bent upwards. I'm pretty sure they've probably took a down sloped top tube into consideration already.
yeah, iu understand that but there are many frames bent in downwards like this. they probably wanted to start a new trend, but it really looks bad in my opinion.
I think it looks better with the bend going up cuz I think the designers wanted it to look like it flows from the stem to the rear wheel, insted of stem to seat