Different Threat Today
The threat we face on the streets today are very different than the threat faced in south east Asia hundreds or thousands of years ago which is what TMA were developed for and is still today, essentially, the focus of these systems. TMA is basically formal military training for a thousand year old battle field complete with formations, weapons of the era (swords, nunchuka, Sai etc.), uniforms, ranks and compliments to senior ranks (bowing).
Today, the threat doesn't attack with the above weapons or on horseback which is what flying kicks were developed for.
The Urban Threat
The threat today has had too much alcohol, uses violence and the shock of violence to his advantage, uses superior numbers, takes belongings at knife point, lurks in the dark in urban areas, carjacks, breaks into homes and in the extreme actively tries to kill other people for no real reason.
This list is not exhaustive. It is a very different threat environment to what the warriors faced in the past. We need to study systems that are geared up for todays threat.