No, they did not offer that while on the call that I received earlier today, even though I asked to be placed on another airline for my same dates.
All they offered was to move MY travel dates, to which I replied "sorry, I can't move my kids' school district's Spring Break". When I called the Diamond service line a few moments ago, the rep had to search for the info... and that's how I learned of the service suspension dates. I am going to request that they put me on another airline, but I'll do it in writing, via email.