I don't know. If you buy Mercedes, it looks a lot like last years Mercedes. If you buy Ferrari, it looks a lot like Ferrari in the previous year. If you buy iPhone it looks a lot like iPhone last year.
I think that it is ok to a company have a style of their own. You recognize very quickly, who has made the product. Of course it has to evolve, but it can still remain some characteristic of previous models.
In that case you just chose a maker that makes cars, phones, clothes that suits your style! It is very hard to maintain recognizable style, if you change it every year!
Over all I loved the design of the m8, so keeping the same look will not bother me at all. The biggest weakness to me was the UltraPixel camera, though it was a great idea trying to distinguish them form he rest I don’t believe it reached an acquit level to surpass rivaling smart phones. I’m eager to see exactly what this phone will offer when reviled.