I think it looks awesome! Looking forward to seeing more detailed pictures and specs!
The wheels aren't standard anyway, those are the optional HFP wheels. The wheels the Si gets will most likely be the same ones on the hatch sport models.Not liking those wheels one bit but fortunately this is just a prototype which could potentially differ slightly from what we see in a production model and if there's anything easy to change from prototype to production model, its those wheels.
Would be crazy for them to add it and I doubt there's any sort of regulation that would require it but wouldn't be entirely surprised. It's not like most of the Si community will care, most are like us and want to ride it through the powerband.ECO would be a button I would never use!