So are we in danger of losing the Chineseness that made these Chinese arts unique?
Nope. What you lose is silliness of "different principles."
Properly applied principles look almost identical. That is what San Da is showing you.
It's not that major differences in execution are disappearing. It's that they never were valid.
"In the world of martial arts, respect is often a given. In the real world, it must be earned."
"A stupid man's report of what a clever man says is never accurate because he unconsciously translates what he hears into something he can understand. "--Bertrand Russell
"Liberals - Cosmopolitan critics, men who are the friends of every country save their own. "--Benjamin Disraeli
"A conservative government is an organised hypocrisy."--Benjamin Disraeli