Based upon that then definitely no reason to wait as the Bronco is rated for 20 mpg with the 2.7l 4wd. https://www.fueleconomy.gov/feg/bymodel/2023_Ford_Bronco.shtml
I am not willing to wait either. Unless it takes 3+ months to get my build date then I may reconsider. Now, if I thought I could get more power AND 23-26 mpg I would wait either way. Hard to say what I believe on mpg for the 2.7.