Goofy may get more screentime because Donald and Oswald are kinda similar.
I mean, I think they did a good job differentiating them in the first game (then in the second Oswald's personality was kind of gone so they didn't have an issue) by making Oswald less prone to violence and outbursts (more of a low-key, snarky angry unless Mickey REALLY screws up) and the Walt angle, but needing to interact with two angry, jealous types regularly might feel a little samey. Putting Goofy and Daisy first breaks them up.
That said, yes, it IS wonderful that if you interact with Donald he freaks out!