The Calling

[TinkerTech]

The only other thing I can think of is the Crystal Exarch may have been looking for Yda who is dead, since that's who Lyse was masquerading as, but that's the only other reasonable explanation I can come up with.

Still it's odd. So I'm asking questions.

I find this to be a reasonable explanation. If the Exarch never knew that Lyse was masquerading as her sister, he would be looking for Yda, and getting nothing because she's dead.

Although if memory serves the Exarch was explicitly looking for the WoL and kept missing, rather than delibrately looking for the scions as well. Still doesn't explain why she doesn't feel anything. It may just be a detail the writers forgot. A plot as big as this, it happens.