Apparently "The stanza formation could be 4,4,4,2. It would give greater impact to the last two lines - the final two lines do have the feel of a couplet about them."
Now, that's funny. That's very bizarre, Michael. I can't imagine why the last two lines of a sonnet might feel like a couplet. Not at all. I mean, the rhyme scheme's only ABABCDCDEFEFGG, so it must be a total coincidence.
p.s. happy birthday, Keatsikins. 211 and you're all grown up! /conversing with t'dead.