I think it's silly to assume that this was somehow racist motivated, or that JJ did this to simply appease racist trolls. It's about as daft as claiming Rian Johnson was motivated by racism or appeasing racist trolls when he diminished the importance and prominence of Finn's character in TLJ (a black main character that JJ created and that had racists in uproar).
The reality is more likely that just as Rian Johnson didn't like the way many of the narrative threads and characters were going in TFA, and essentially retconned things with TLJ, JJ also didn't like the way many of the narrative threads and characters were going in TLJ, and similarly retconned that too, essentially taking things back to being closer to his initial vision with TFA. In other words, they just had different creative visions and ideas, with both the narrative and characters.
As an Asian myself, I find the immediate jump to try and turn this into some sort of race thing by some disingenuous. Hell, I'm pretty sure JJ features more prominent characters of colour in TRoS than there are in TLJ.