I think they did a fantastic job of bringing the design back in line. That initial look was... yeesh.
My biggest concern is that studios become less inclined to try new things and take fresh approaches to existing properties... resulting in recycled stuff that's deemed "safe" and "acceptable."
I don't think the displeasure towards Sonic was a vocal minority this time, so hopefully this is where the whole thing ends, and we don't have fan petitions every time a beloved character is "ruined."