Care to explain what the stupid decisions are? Other than not releasing the Note5 in Europe, I can't figure out what you're talking about on the mobile end. I own the S6 Edge+ and it's by far the best phone I've ever used, and makes the iPhone 6 Plus look and feel like a dinosaur. Especially given that is it expected to have almost the exact same design for another year.
Well, as you said yourself not releasing it in Europe is pretty bad. Not combining it with the Note series and just releasing an concentrating on one model. The overly aggressive memory management, especially in light of the increased 4gb of RAM. They did get the pricing right, I thought $50 less than the iPhone would have been smart and they came in at about $35 less, probably not enough for consumers though as the days of expensive flagships are fading away. Only Apple can still sell an expensive flagship. Phones like the Motox which are flagships but are much cheaper, and of course the takeover of the Chinese manufacturers will put more hurt onto Samsung. Taking away external memory then gouging consumers for more memory, I'm sorry $100 is ridiculous for 32gb more of RAM in this day and age. Yes Apple does it, but Apple can get away with it. Removal of external battery probably isn't a big deal though since they have such awesome power management on their phones, but it still probably ruffled some feathers. Of course we can't forget the biggest mistake, plastering their logo on the front of such a beautiful phone (I'm kidding!! Sort of...).
It's an awesome phone, I enjoyed it the time I had with it. Unfortunately I have no faith in Samsung phones anymore after being burned way too many times. I can't say there was any particular issue with the edge plus as I didn't have it long enough, I just didn't want to take the chance with $800+ and my business.
At the end of the day we will see what the sales numbers are. Sales are NOT necessarily indicative of which phone is better, and I'm not saying any phone is particularly better or worse than another. I am saying though that Samsung could have made better decisions and that their sales will be poor for the edge plus.