Having to take a photo of the meal each time is frustrating, sometimes you might just add a snack as nuts so no need to add a photo. Also later in the day you might remember to add something and not have the photo to hand.
Once its in the recents its also a little annoying you cant change amounts. You may have the same meal but different amounts and so have to add it all again rather than adjust. The same goes for the set meal plans. Changing amounts & removing ingredients would be helpful.