They did have creative differences in the beginning but I hadn't heard specifically the fascia design. I forget the source but I heard the delay with design was critiques and incorporating two and four doors."The 2021 Ford Bronco was originally going to debut as a 2020 model year vehicle, however the project was delayed after the fascia design received some criticism in focus groups."
A member of a JL forum claimed to have been in one of the focus groups for the new Bronco. His general impressions weren't very favorable.I remember "hearing" that something design-wise didn't score very well with a focus group - but I've never heard exactly what it was.