I bet that the Chinese designs are probably pretty good. Let's be honest, EV drivetrain design isn't exactly cutting-edge science. Batteries, motors, and controls. Basic electromechanical engineering at this point. Bead-and-butter stuff nowadays. And the EV industry in China is heavily bankrolled by the Chinese government, so they've basically taxed their citizens in order to throw hordes of money and people at the problem to develop the designs as fast as possible. No surprise that they've made quick progress.
Why shouldn't we leverage their work, especially for something that totally isn't at the cutting edge any more?
The main issues here is long-term replacement parts. They have a history of developing whizzy auto models, and then dropping all support a few years later. There's no time for a secondary parts market to develop, so people wind up with a 5 year old car but no replacement parts are available. They're practically throwaway items. If western car companies want to adopt Chinese designs, they better be making their own plans for replacement parts.
When I buy my first EV, I'll stick with US or Japanese. Those companies know how to keep a car alive for 15-20 years. It's part of the reason why they're more expensive. Supply-chains are not cheap, but without them, your expensive piece of tech turns into a paperweight.