At this point you are just hurting yourselves by being too involved in this one-sided relationship.
They just don't care enough to make a short list, acknowledging the major issues that need reworked or improved, based on player feedback and what is their opinion regarding these. It's very clear that there is no point expecting anything.
Not that they would be obliged to do so, but they asked for feedback.
We did our part. More can't be done.
