Maybe hold out some hope? I don't fly EI so this doesn't affect me but:
1. The website doesn't say anything about ending the agreement as it comes to earning miles on EI flights. Although the letter to the DOT is dated yesterday so the website just might not be updated yet.
2. A codeshare agreement doesn't necessarily mean you still can't earn miles. It just means UA won't have codes on EI flights and vice versa.

Logical to think you won't be able to earn miles on EI flights but as of this moment that's not the case.

-RM