It's still rotten tomatoes.The reasoned, argumented criticism referring to the poor writing skills of Rian Johnson might well be the rotten tomatoes of the 21st century. The trolling that called the performer out for being an Asian woman and threw a ton of abuse at her for her physical appearance has nothing to do with the tradition of rotten tomatoes and everything to do with blind stupidity and hate.
How many of the people who allegedly made ethnic comments thought about it 5 seconds after?
That's technology in the 21st century. You can say something blunt or rude and not spend much effort at it.
If the character was portrayed by Kelly Hu, would there have been attacks on her race?
Probably not. Johnson should have thought about audience response when making decisions (as Hamill suggested).
Disney was criticized for erasing Tibetans from Dr. Strange to appease China, so it isn't like Disney is standing in a steel house when making accusations of others on racial preferences and intolerance.
As for Transformers--the point is they have no artistic interest in the genre-that usually translates into a lack of merit (which in the case of Kurtzman and Orci is demonstrated repeatedly).