I personally couldn't bear the consistent boot failure of MenuHax. Also with MenuHax, you have to make sure you don't accidentally go back to Sysnand when you do certain things. Besides, the way I look at it is, you already took a risk downgrading to 9.2, why not go all the way? Same risk since you're still downgrading. Also, I believe Sysnand's Firms are protected the same way as Emunand so, it is no less safer.