Gahhhhhh :-( Hang in there.

Do you feel this child truly has a separation issue or is the child just using learned behavior and manipulating to get what she wants? Could it be from the changes in daycare over the last year and the fact mom is pregnant?

What would happen if your tv "broke" unplug it...go to turn it on tomorrow and it just doesn't work. Would she flip out but eventually come to terms and move on?

It sounds like you have tried many, many strategies. Would mom get her act in gear if you gave a probation period?