There is no Cixi in this scenario anymore, there is Guangxu
Cixi only plotted against Guangxu after his Hundred Day reforms, otherwise Guangxu has no basis to accuse Cixi. (I'm not going to go into how even that's going to not help him and only make him more suspicious if Cixi mysteriously dies one day.) And the Beiyang army programme was begun at least a decade before this whole thing happened.