Honestly a lot of this is a big Nothing-Burger.
Some of what you said is straight up wrong--the Espers weren't called Eidolons in Japanese FF6, they were called Genjuu, or Phantom Beasts. And when I first played FF6 as a kid/teen, "Esper" was just a fantasy made up term that could mean anything--I didn't learn its real meaning until way later.
And besides, would you really want them to keep the Japanese term? With that, either Terra's mom fucked a Juu, or she fucked a Beast. I'd rather she fuck a Telepath.
And as for "keeping the series consistent"--the series' games are (or used to be) not plot-related in any way outside of recycled terminology, and even that wasn't always consistent even in Japan. So who cares if one game calls them Summons and another calls them Eidolons?
Regarding FF4's translation... to be honest I don't see how its all that bad. I recall playing the PSP translation later, which is supposed to be way more accurate... and being disappointed that the differences amounted to basically cleaning up the text to read more naturally and less like 16-bit video game text. All the story, emotional moments, plot beats etc. come across just fine. Two kids still get stoned and the bard is still spoony (even if only the NA version calls him that).
As for the covering up of boobies in the older games.... who the fuck cares? This was the 1990s, go rent some anime OVAs from the time if you need animated boobs that badly. Honestly as a kid growing up when these games were new to our shores, I never noticed the censorship and did not care.
........
And, not to be passive aggressive at the farms here, but I have wondered if this whole thing is a bit of a catch-22, because for as much as we bitch about censorship we also often bitch about coomerbait or inserting sexual content into mediums meant for kids (which video games certainly were in the 1990s).
Granted, my own catch-22 is like I said, even when games blatantly allowed Nudity (often on Sega platforms)... I usually didn't even notice or didn't care, because this was the days of low resolution CRTs, I was too young to be aware of that stuff, and most of the time when you're playing a video game you have other priorities, like "not dying and having to re-fight the last three bosses."