With five balls of yarn in my stash, I do have to think about how far the yarn will go. What you see here has taken three balls.
This picture tells me that it might be a good idea to short row the sleeves a bit.
Lengthening the shoulder side of the sleeves via short-rows, to sit evenly with the underarm section might be something to try. I do have a short-sleeved, summer raglan that I did not short-row. When I wear it, I am always tugging downwards on the sleeve tops to bring them even with the underarm section. While this never seems to be an issue with wrist-length sleeves, with short, cap-length sleeves, it is. Short-rows might just be the solution to that problem. I'll let you know.