I don't have any fundamental problem with BMW expanding the M line. It makes good sense all around; marketing, business, customer perspective, etc. I even like M SUVs. The X6M is one sick vehicle I would own/drive any day. I also like the little 1M despite it being sort of a parts bin type of car.
My problem is that they are splitting the coupe/sedan which have both always been M3s into M4/M3. That is unneeded dilution and confusion as the M3 Coupe "magically" becomes the M4. I suspect there may be some other changes to distinguish the cars. I can't imagine they will be quite as identical (less door count) as today's E92 and E90 M3. I'd guess they will also want the M4 to be priced higher. I certainly do not like this likely outcome of having to spend quite a bit more just to have a coupe.
What do others think on how identical the M4 and M3 will be less the obvious issue of door count?