seeing a wide pokeball isn't very eye pleasing my brain. just looks like a fake pokeball now, even though you're right, but it still looks odd...both ways actually.
something needs to happen with that pokeball though. there's no reason why it would be straight on like that if the sign isn't. what if, you finished the roof, without the pokeball sign on top of the canopy, and made some columns to hold the front of the canopy up. then, attached to one of the columns, is a pole sticking out and a pokeball (wooden) sign is attached...you know, those signs that swing on small chains. it'd have to be a smaller ball, so maybe it wouldn't look so weird being straight on. having a small pokeball on the current sign wouldn't use up enough space.
it sucks, I know, but you get the point: (whoops, forgot to take out the original sign)

the dome is looking much better, and yeah, the tops are the same color...I don't know what I was seeing earlier.