I've sewn up a second pair of arm warmers and prepared the next pair!

One of my WiPs is a red cabled sweater. I'd done the front before I abandoned it a few years ago, and more recently I knitted one sleeve and started the second, but I'm not happy with it. The neck at the front is too high (I can't stand anything up near my throat), the tops of the raglan sleeves are very narrow and in fact the whole sleeves are narrow, and I have serious doubts about whether my head will even fit through the neck hole once I'm done. I've spent weeks on knitting it but now I'm seriously thinking of unpicking it and starting over with a different pattern, but... over half the yarn has already been knitted up, and anyone who knits knows what unpicked yarn is like. Not sure how it would look re-knitted. *sigh*