With Uncharted 4: A Thief's End, Naughty Dog have created their very best game and one of the best titles of this entire generation. If you own a PlayStation 4, you simply need to play it and if you don't, this is certainly a good reason to purchase the console.
In short, Arslan: The Warriors of Legend is a great addition to the franchise despite minor problems that might annoy new players or those that are playing for the source material. It won't convince anybody that has hated the many, many games up until this point, but it doesn't really even need to.
For $15, this is a good game to burn through over a weekend. Expect anything more than a above average tie-in, however, and you'll be left disappointed. Good for fans of Heroes (both of them) and anybody who longs for the days of endless licenced media.
Don't bother buying unless you already know you'll love it. It's a hard game to judge, but most people are better off going for something more entertaining, or at least getting it on PC. Starpoint Gemini 2 could be great, but probably won't be.