don't know about endorsement but of all the people the bears have been linked with over the past couple of weeks or so, Trestman and Ariens looked like the best options to me. That doesn't mean it's not a risky choice and for me it will either be seen as a stroke of genius or could lead to a new Bears GM in a year.
The Bears have a good base to build onto, especially compared to other teams that fired a coach, so anything less than a 9-7 or 10-6 record will likely be seen as a step back from Lovie, imo, even in Trestman's 1st season. Remains to be seen if he will be up for it.
But first things first - shore up that O-line