Agreed, the reason for the freeze was reported at the beginning of the week and is the “Born of x” trait of the Nexus troops.
What I just don´t understand, there is a “Known issue” article created by @Kafka, where the following workaround was declarded:
Back then, when the issue with the Wyrmrun traits appeared for the first time, the traits of the Wyrmrun troops have been changed very fast, it happened in the first few hours of the Wyrmrun release event. So I suppose, changing a single trait of an existing troop is a simple task. Why is the declared solution still not executed? The known issue article was created 3 days ago. Has the dev team been too busy with not solving the broken guild wars score during this week?