This is to be commended. However, sometimes it tends to become legalistic in that women are required to abstain from wearing makeup and pants. They also must have their heads covered. Such practices are not wrong in themselves, and are good examples of propriety. However, when they become requirements for acceptance in a church, it is legalistic.
Legalism leads to bondage and the requirements of keeping the law to maintain salvation.
It then becomes a means by which a person's spirituality is judged. I am not saying that the Oneness Theology necessarily leads to to legalism, but it seems to be quite evident that it has taken over much of Oneness practice.