Read Fernelhawe's post in the Lore forum on the language of Dragons. All will be made clear then. If you still feel like they shouldn't have made any changes, then I honestly don't know what to say to you, aside from "Learn Japanese and switch to JP voices". As Ferne explained, absolutely nothing is actually left out, he just condensed what Midgarsormr was saying based on rules he'd come up with for how Dragons talk long before even 1.0 launched, so this isn't the localization team "Completely deleting entire plot points", nor are they changing the intent of what's being said.

tl;dr, go read Fernelhawe's post and stop claiming we're being left out of important plot info just because we don't speak japanese.