> Vs 3- " Joan came riding from Lorraine" <
Yes.

> and "England burnt her at Rouen" <
Whether or not that's the correct original as written by Carter, it doesn't rhyme.

> also "Theirs the shame and ours the glory" ( It is from a French poem) <
However the "theirs" and the "ours" are at best ambiguous, and at worst completely wrong for a song in English. I definitely prefer "England's shame and France's glory".

There are few songs that can't benefit from a bit of folk processing.

Richard