I sometimes don't understand what the arguments are really about, since they are the same arguments as in previous posts... the continuous beating of a dead horse will not change anyone's mind.
There is validity to everyone's point of view. I have done TCMA for most of my life but my approach has always been to cross train in as many arts possible, go to seminars on different arts, exchange ideas with fellow martial artists that practice different arts... what better way to understand what one particular style does than to experience it first hand.
Adding grappling, wrestling, submission training to your routine only enhances your skills... apply what you know and you have the upper hand. E.G. grapple and apply Chin Na joint locks, use pressure points, etc. to better manipulate your opponent.
Absorb what you find useful and modify it to your fighting style. If something works it works... might as well add it to your arsenal.
I think the main issue is that TMAs are viewed as stagnate nowadays by the modern sport combatants because they want to achieve results in a shorter period of time, which is understandable... why would you want to practice 7 years to gain the primary fighting skills, that you can become proficient in, in a shorter amount of time?
However, with the traditional training you also gain a better understanding of techniques, principles of movement, and their variables.
So, they should walk together...
"So it is said that if you know your enemies and know yourself, you can win a hundred battles without a single loss.
If you only know yourself, but not your opponent, you may win or may lose.
If you know neither yourself nor your enemy, you will always endanger yourself.- Sun Tzu (The Art of War)"