I agree that 3rd and 1st person animation should match each other as closely as sensibly possible, and that there are things that could be done better on 3rd person, but honestly, the requirements for the visual appearance of the two are somewhat different.
In 1st person, we want to keep the weapons visible (so no putting the Elf’s otherwise nice-looking two-hander stance there), we want them to not block our visibility too much (sometimes quite problematic with shields), block should be clearly distinguishable from the ready stance (this could use a bit of a rework on Rapier), and of course, everything needs to look good. A bonus would be if the stances and movements also looked natural and comfortable (the block stance with Empire Two-handers certainly doesn’t feel like that).
In 3rd person, the requirement for weapons being visible doesn’t really apply, and neither does the visibility blocking. Different attacks should still look at least somewhat different, even if clearly distinguishing them isn’t as big an issue. Block should still be different from ready. What looks good (and natural) is different in both PoVs, and a current issue with 3rd person is that weapons should be different in their moveset and in ready stance in particular, as without reference to compare weapon lengths, it’s kinda hard to tell which weapons exactly your elf dual-wields.
So some thing could be done better, and the 3rd person animations could match the 1st person ones more accurately than they now do, but I don’t expect there to be a complete symmetry.