After looking at it for several minutes I can see that many of the major planets from SWTOR are missing: Voss, Tython, Belsarvis, Dromund Kass, and Quesh. As well as some of the smaller ones like Uphrades, Cademimu V, Athiss, Taral V, Zadd, Kaon, Denova. And a couple other that I can't seem to find Seline, and Malachor V.
It could be that I don't really know where these planets are or that I overlooked them somehow.
Added: These planets like Mekab could have been added after the creation of this map.
That is because SWTOR keeps adding stuff, they should just use more of the existing planets since there are so many to choose from already.