What is the likelihood of the feedback form leading to improved rebooking options on an award ticket (TK issued, UA operated) with a schedule change? I was rebooked automatically to other UA flights, but would prefer slightly different (UA) flights. Those other flights do not have I availability, but they do have J seats.

The ticket looks fine on the UA website, but messy on the TK website, so I would rather not ask TK for the change unless there is a good chance of success, for fear of making it worse or losing the ticket.