"the "best" version should have only two stanzas."
Totally agree - even the habit of repeating the first verse is totally unnecessary and blunts the tragedy of this superb condemnation of war.
The name given in the Scots version is 'Mallie', probably a diminutive of the Scots Gaelic - Malmhìn (Malvina) = "of the smooth brow".
Personally, I find the oft-pronounced, "Maaa-llie" somewhat ugly and also unnecessary - "Mallie" is a beautiful-sounding name which flows off the tongue and does not need to be broken in half, in my opinion.
Jim Carroll