I don't think it's that bad, because otherwise it'd be a sucker option. Mild near-sightedness in exchange for access to magic is a great bargain, and I'm a bit annoyed that it's falling behind in favor of using our Fylgja as an offtank (Which isn't great beceause it's never going to have as much Endurance as we will), or a random gacha roll every turn at the cost of a gigantic compel that will get us into trouble.
Shield-Owl isn't bad, I just think it's not a great option and doesn't make best use of the opportunity. Again, that level of nearsightedness isn't going to seriously harm day to day life or ordinary battles, only things where extreme ranges are in play.