Does UA sweep Economy Plus when you lose 1P status?

Hi FT-ers,

First time posting - your advice has helped on many occasions!

My husband has been a 1P for many years, and I have been 1P or 2P. We have not been flying as much in 2012, so will be 2P for hubby and GM for me in 2013 :(.

We are traveling to Mexico in Feb 2013 - will UA sweep us out of E+ for any reason? If not, do we risk losing E+ if there is an equipment change or any other flight disruption?

Thanks - your advice is appreciated!