I think Horrido hit it.

This won’t approach United business class service. One poorly paid and trained regional flight attendant to serve the entire cabin will do more to hurt our product than any perceived savings some scope work around will provide. (After the newness wears off, it will be a junior bid position). I can imagine the unhappy businessmen tweets now.

No doubt our marketing geniuses have been talking to potential customers to find out if they would pay more for B\C service, and of course the answer was “yes”. Except in the customers mind BC service is what they experienced in a mainline cabin.

Or are they going to train their flight attendants to UA biz class standards and staff a second to serve econ? This is where the economics won’t work, long term.