One view is that their Ou Kai has reached its peak, and few people can match it.
Another opinion is that their European model is inferior and misleading children.
Shu Tian's biggest problem is:
Pay attention to precise structure, but it is easy to be the same, lacking natural lasting charm and interest, not to mention the changes in ink color and composition.
It has a relatively complete system. Once trapped, from aesthetics to pen, structure, composition, and even the running script behind it, it will be complacent about its system and get farther and farther away from the ancients.
Those who write Tian Kai basically don't write seal script, even if they do, it is wrong to use a pen, which is imprisoned from the whole thought, aesthetics and pen use.