Regretfully and finally and necessarily, I frogged (ripped out and dismantled) an entire sweater that I knit a few years ago for my son. Initially I thought that the problem was "just" that the sleeves were too long. Nope. Upon having him try it on... His shape and the shape of this sweater just did not go together.
I have another project to finish knitting before I can re-commence this one (am going to use a different pattern!)