I have friends in Story County and know it pretty well. Story County currently has three at-large supervisors, two Republicans and a Democrat. With some exceptions, they all seem to get along pretty well. And one of the Republicans has a very strong interest in water quality, which is not common among Republican officials in Iowa.
Even from a Republican point of view, I don't see how forcing Story County to go to a district system would really improve things. It would be much more likely, if anything, to increase partisan arguments, policy disputes, and territorial squabbling.
And Story County does have more registered Democrats than Republicans. If the real goal of the bill is just to cause more teeth-gritting and general unpleasantness in urban counties, and to make it harder for those counties to get things done, I'd say it's right on target.
I'm so happy to see this! We have a similar weekly event in Ames, which we call Postcards and Pints. It's really a wonderful way to do something constructive, bolster community, and preserve your sanity!