I have extra yarn and love the colour (Edward Discovers the Woodchippers make Excellent Juicers) so I'm considering options to fix it without having to do a major rip out.
The construction is a one piece body and the cable collar is added like a giant button band. That's the part I'm going to remove and redo. This picture gives you an idea of what I mean.
1. Rip out the 2nd and 3rd cables and redo them with no increases (I don't love the increases). Then do a wide garter stitch edge that can serve as a foldover collar. I worry it might cover the cable part, but it might not.
2. Lazier option: don't rip out the 2nd and 3rd cables, and instead just undo the bindoff and do the garter collar.
3. Similar to the Maxfield construction: rip out the entire cable collar and redo it as a separate piece in the width I want. Knit two strips, graft them together and sew them to the sweater. This is the very industrious option...
I've been thinking about fixing this cardigan for over a year. And now, by writing about it, I think I've settled on the lazy version with the big garter collar.
Anyone have other ideas?