I highly doubt removable battery and microSD are pure deciding factors. The majority of casuals don't give a crap about those things. I love how you mentioned the "copy Apple route" when Samsung is the biggest culprit. Hell it might even be the biggest reason to their success.
The argument that most people don't care about this and that is a fallacy. You're right that most people don't. But people like options and Samsung devices offer the most options and flexibility. Quite frankly if you hate options and flexibility you already own an iPhone, so the manufacturers chasing Apple now have already lost. Meanwhile Samsung is winning big, and to pretend that the options they provide have nothing to do with it is the kind of suicidal thinking that has led HTC to the brink and Motorola, the company which literally invented the mobile phone, to be broken up and it's spare parts sold to a company whose most well-known product is a search engine and their primary revenue from Internet advertising.
Also, continuing to accuse Samsung of copying Apple *NOW* betrays a fundamental lack of understanding of how Samsung got where they are today. Pointing a finger at Samsung now is basically trying to close the barn door about 40 years after the horse bolted, because the strategy of starting out in a new market by copying the leader and then rapidly iterating wasn't even a Korean strategy to begin with, much less one Samsung came up with.
It was a strategy borrowed from the Japanese, who entered American markets in the 1970's by copying leading American products and rapidly iterating until they had established themselves and then moved on to systematically destroy American domestic industries. Less than 20 years after the Japanese entered the market, there was no longer a single American domestic TV manufacturer. The Japanese called their methodology of constant iterative improvement
kaizen and it has become a cornerstone of business school curriculums.
The Koreans saw what the Japanese did and decided they could do it to the Japanese the same way the Japanese did it to the Americans. Japan hit a wall when their stock market and real estate bubble exploded and never recovered, but not for economic reasons. I don't know how much you know about Japanese culture but I don't pretend to be an expert. I can only say that certain elements of their business culture prevented them from recovering from the bust that seems to happen every decade or so in a regular cycle after a boom.
So here come the Koreans. They entered the TV market almost precisely the same way the Japanese did a few decades prior, feeding at the bottom and iterating rapidly, and in less than a decade Samsung and LG drove once-mighty companies like Sharp and Panasonic to the brink of bankruptcy. Since we are on GAF I shouldn't fail to mention Sony, who have only themselves come back from the brink because of markets like game consoles and mobile phones and by bringing in CEOs trained and forged in Sony's divisions outside of Japan, first Howard Stringer and then Kaz Hirai, to lead the company. Their TV business hasn't made a profit in over a decade and they are betting on several long shots to survive the withering Korean assault and realistically they will have to pack it up and leave the TV market if their last resorts don't pan out.
Now this little lesson in recent business history brings me to Samsung. They did exactly the same thing to Apple they did to Sony in TVs nearly a decade prior. They copied Apple and then iterated rapidly starting with the original Galaxy S. Less than 2 years later, their fourth-generation Galaxy S3 is barely recognizable when placed side-by-side with an iPhone. (I said fourth-generation because there was a little-known original Samsung Galaxy, the Galaxy S was their second-generation Android smartphone.) There is no one now who thinks Samsung's current products are copies of Apple's.
So Samsung did the same thing that has been happening for 40 years, they copied Apple to gain a foothold, iterated much faster than Apple did, and now they have established a recognizable and unique brand of devices entirely different from Apple's. The funniest thing about Apple's lawsuit against Samsung was that by the time the case reached trial and deliberations were completed, all of Samsung's products already looked completely different from Apple's and were in every way superior in function. They did exactly the same thing to Apple in just 4 years that they did to Sony in TVs in a decade. The pace of this business technique is accelerating.
Now if I were Samsung I would be watching my rearview mirror because objects there are larger than they appear and here come the Chinese and they have now seen the Japanese and Koreans use this market entry method with absolutely devastating effect. I've spent the last 2 weeks in China as a tourist looking at pretty things but it's hard to not travel through China and see the world's next superpower in adolescence. China has already surpassed Japan as the world's second largest economy and they have a huge advantage over both South Korea and Japan in a massive population which is increasingly well-educated and abundant natural resources.
China has already in the past few decades become the world's factory. Since they already build everything sold by Japan and Korea, they already have the knowledge and techniques to manufacture everything. There can be little doubt that the next Samsung is going to be from China. Maybe it will be an established name like Huawei or Lenovo. Maybe it will be someone we're never heard of before. But let's not pretend that there is anything exceptional about Samsung, not when people once believed there was once something exceptional about Sony and now look at them. And the next company won't be exceptional either, they'll just be meaner and hungrier and even better prepared than Samsung was. The cycle will continue.