Heh, I had pretty much the opposite reaction, Snitch!!
I LOVED that the characters have Chinese accents, lol, 'cause it doesn't make much sense to me for them to have US or British accents. If they were to have US accents, I dunno, it would feel very US-centric...? And the accents sound natural, not forced into a mocking, gross stereotype, so it felt more authentic to me... I was actually quite bothered by the British accents in CRAZY RICH ASIANS. I was like, "WHY YOU GUYS NOT SPEAKING SINGLISH?? YOU THINK YOU TOO GOOD FOR SINGLISH IS IT??"
I also always hated how the animated version had Fa instead of Hua. It felt like a choice made to pander to Western audiences, because Fa is easier to pronounce than Hua, and we always read her name as Hua Mulan in class.
Now I'm very curious to see how my family and friends will react to the live action film. I wonder if they'll be annoyed by the accents or not, hmm...