It's pretty much only due to a lack of Hax skills, because Next Dimension Shaka, aside from a very powerful Ultimate Move, is not really in the same level as say, Whis and Vados in physical capabilities alone, nor fighting abilities.
However, abilities such as sending the opponent's soul to other realms of existence, depriving them of their senses, and destroying their minds makes him the clear winner.
I agree with adding it to Shaka's victories, but if there is a not explaining that his victory was achieved thanks to his mental / spiritual moves.