I'm sad to hear that they will be removed, as they're a lot of fun. However, they do require more interpretation than they should, and are a perfect example of 3pp products for 5e that aren't so much imbalanced as they just...aren't written correctly for 5e.Its one of the subclasses made for a supplement made in the ok from the creator of League of Legends. The subclasses are about to be removed because there was a misunderstanding between the two companies about rights.
As for the mechanics themselves, they are all over the place and the subclass is not written in a way that makes sense in 5e. Its not unbalanced per se, but it just does not work well because the features interact in a weird way with the base 5e rules.