I'll try to sum some things up.
First, you don't choose it as a race, you just get a spawn unit, so basically any race can use it. The buildings pathing is usually too small, so you can build them inside each other. Their look is also not too special, or good. Also, the heroes are just too powerful. One of the buildings have a missing icon (green), and the other one is the autocast-orb icon of the destroyer, which is not good for a building icon. Other icons have problems too, like not having borders. Etc. The towers are too powerful. The hero skills are not too well done, also miss some icons. And every new unit has a chaos attack, which makes them own everything in themselves. It all just makes the other normal races useless. And the units don't really have a variety neither, around 90% of them are void walkers.