Even with Tezuka's works, the unfortunate racial caricatures do sometimes hold a book back from being translated. Most point to this as the reason why the Jungle Emperor/Kimba the White Lion manga still hasn't been, or may never be, translated to English.
Personally, I think a minor edit like a character's lips isn't as impactful as something that actually affects the way a scene is supposed to be read like taking out nudity or changing dialogue. Didn't they also replace guns with "laser guns" as well? I wonder if that will be restored.
I do wish that the "remastered" included a new pass at the translation though. I think that's the biggest thing holding
me back from picking these up. It's not even that I hate the current translation (although it could totally be better), it's just that it's not quite a different enough release from what I already own to invest in. If it had been a true Kanzenban translation, with all of the covers, color pages, and a new translation that would be NO QUESTION! I'd be preordering as soon as it was announced

But I guess that makes me just another fan with super specific requests that aren't necessarily realistic.......