Thief. I cruised under these three years ago on a solo, wet day, while I was checking stuff out for the book. I'd meant to return to the arete in the right of your photo to do an FA with the girls. Maybe let Katie place a bolt. Alas, the FA is now taken forever. And, of course, as you point out, it may well have been "scrambled up" already. If I remember, the shallow water streak/groove to that arete's right looked worthwhile too.
These two seem like legit routes. Should they be written up and added to the list? If you want I'll do so. Can you give some more detail?
EDIT: If I recall these aretes are about midway from the Towers to the top edge of the Balconies, maybe 300 yards south of the Towers? And not really visible from any distance due to intervening ridges. I don't think any sane approach could be made other than by turning off from the normal Crowley Towers approach to the right/north a few hundred yards before the Towers? (I say "sane" because on the day I was there I continued way down and around, eventually coming out on the Balconies Cliff Trail way north of the Balconies, but that would be a dumb way to approach these).