I dont think Mandalorian armor was discuised so much bcs ineffectivenes ...
Since we are talking about world, where almost no one uses projectiles, or meele weapons ... your main problem here is energetic blast dispersal and absorption ...
Problem here was more about that Bo Katan was first canonical character with sexualized armor ... i dont think its so huge deal, but its kinda shame, concidering how hot female Mandalorians were in regular armor: