I hate to say this, but I fail to see how this really matters.
Consumers buy their ticket based on price, period, Amen.
When IFE is there, yes, they enjoy it, but they don't buy their ticket based on service or the presence of amenities.
The fact that US still exists is proof of that.
I don't particularly care whether a customer has IFE. Read a book, sleep, or bring your own if you have to have it.
Any resources that US is holding need to be directed at labor relations, specifically addressing compensation.
Only then will US drag itself out of the sewer of ratings.
Keep your eye on the ball people. Those consumers do not give one hot da*n that you are paid poverty wages. They choose where to fly. When IFE means that much, they'll act accordingly.