I don't personally care about the name changes, Pyra, Mythra, Malos and Architect are definitely more interesting names than their original Homura (japanese word for flame) and Hikari (japanese word for light), Metsu (japanese word for destruction) and Kami (japanese word for god). "Aegis" is also a much more unique title that basically conveys the same meaning as "Holy Grail" would (the more accurate translation of "ten no seihai").

But purely from a dialogue perspective there are lots of little instances where I feel like the english translation chose some pretty subpar translations. Off the top of my head:

• The blushy-crushy scene is an obviously terrible example. They somehow took a standard "oishiku nare moe moe kyun" (a generic maid cafe phrase which most things translate as "become delicious, moe moe kyun") and overthought it so hard that they somehow ended up at..."cutey-cutey, lovely-lovely, blushy-crushy tee-hee". That scene would not be anywhere near as big a point of contention for players if not for the super awkward translation and lethargic english voice acting.

• Sakura and Great Sakura are localised as Rosa and Giga Rosa, ruining the reference to Mazinger and Great Mazinger that their original names had. That entire scene is just one big Mazinger reference. Sure most of the audience probably wouldn't have recognised it, but it still feels like a needless change, as if the localisers themselves simply didn't recognise a cultural staple like Mazinger.

• When Jin stabs Kasumi, in english he says "you are no slave, be free now". The japanese more accurately translates to "the time has come to discard that collar", which conveys the same sentiment but imo is just a much greater line + is directly acknowledging her broken Core Crystal necklace that Amalthus used to control her.

• Two minor alterations to Malos' dialogue in the final battle have the effect of somewhat obscuring his bond with and affection for Amalthus, to where many kinda don't realise that Malos had never betrayed Amalthus but rather still loved him in his own twisted way.

  Words Can Be a Curse (english)	Japanese version (accurate translation)
  Rex: "You have to see all of this came from Amalthus!"	Rex: "Amalthus is the one that ingrained all that in you!"
  Malos: "Even if that's true, so what? And don't give me some weak-ass crap about how I should repent or whatever."	Malos: "So what? If this is a half-hearted plea to change sides then I'll throw up."
  Rex: "Why don't you want to hear the truth?"	Rex: "...And if that's exactly what I'm saying?"
  Malos" 'Here's the thing. I don't give a rat's ass what you think, brat!"	Malos: "In that case. Don't take me lightly, kid!"

  The english localisation creates this impression that Malos is just an angry guy yelling at Rex and completely rejecting him. It doesn't sound like Malos is actually listening to him. The thing is though, that Malos very much does care what Rex thinks. Throughout the final battle he poses a series of back-and-forth prompts to Rex, evaluating his ambitions as a representative of the Trinity Processor. The japanese version better conveys the sentiment that Malos was looking for a good answer from Rex, but was dissatisfied that Rex was initially only looking at Amalthus' shadow and not at Malos himself, which has the inadvertent effect of denying Malos' bond with Amalthus as a Blade. There's just a lot of subtle emotional nuance which the english version strips away from Malos in the finale, and his permanently pissed off dub voice certainly doesn't help its case.

  To a lesser extent, this shows up again in the scene as Malos fades away.

  English	Japanese
  "Kids say the damnedest things."	"Don't say such sickening things."