I don’t know if it will change in this remake, but in the original versions on the GameCube and PlayStation 2, S-Grade milk from a Star Cow sold the highest out of all the milks.
But converting it into butter or cheese made the price go down, as it just made regular butter and cheese. So it was better to sell the milk as-is.
It would be nice if the remake allows you to sell new varieties of butter and cheese for even higher prices using S-Grade Star Cow Milk than if you sold the milk as-is.
But personally, the one thing I want the most out of this remake is a sprinkler system, like in Pioneers of Olive Town. I’d literally spend all day watering my crops, unless it rained.
That would leave me with no time in the day to interact with the townsfolk, so relationships are not being built. Having a sprinkler system to automate the process would free up time for me to interact with the townsfolk.