Android makers suffer from the same problem as PC makers. At the end of the day, if you run Windows, its still just a Windows PC. There is very little that hardware can add to the brand experience. It gets worse when you fail to innovate, or innovate slightly but jack the prices sky-high.
If I were Samsung, I'd spin off a separate company for the high-end. There is little kudos in the "Samsung" brand as it covers too large a range of items. They've plastered "Samsung" across all the devices. They need a different brand and brands take time and money to build. Typically of an established player, they have a product/solution/brand and are going to use it wherever possible. Rather like MS trying to put a desktop on a mobile device or indeed a mobile interface on the desktop. If you ask someone what kind of new phone they bought and they say "Samsung" you have to ask, "Which one?" in order to understand what they have. iPhone purchasers don't have to deal with that confusion. That is brand clarity.
Samsung also need to keep their techie users/press happy. Get that battery life fixed. Stop the segmentation through silly storage limits. 128G only is reasonable for a flagship device at the moment. Needing to pick which music/podcasts to sync is far too irritating. USB/SD storage is also not unreasonable. Make replaceable batteries part of the casing if required. It isn't a great deal of aluminium to add to a battery. Contribute to the techie Android ecosystem. RSync and SSHFS as standard please. Help fund that OwnCloud stuff so that it works really well. Help fund a digikam/f-spot port work to Windows, etc. Samsung has shown it isn't good at writing software, but that doesn't mean it can't help. It might be cheaper than marketing.