I am criticizing their dress code as stupid. Why do you need a stupid tie? What is wrong with jeans, in good condition and fitting properly (that is, not dangling halfway down)? Nothing. Why do "sisters" need dress skirts? To me, this just benefits the dry cleaning industry.
It is also not practical attire in field circus. The ideal attire is having appropriate shirts (no suit coats). Polo shirts, if neat and in good condition, will do fine. Pants should be in good condition, and not halfway down. They should be launderable. (This is to save money and the environment.) Sneakers should be worn in situations where walking long distances is probable, and pointed high heels should not be worn because they are not good for the feet if worn for prolonged periods. Shoes may be worn if they are comfortable and fit well--I have good work shoes from L.L. Bean that I wear in preference to sneakers just because they are more comfortable. Accessories should be comfortable and of good quality, not necessarily leather.
Now, "sisters" wearing dresses and skirts should be contingent on the weather. These may be appropriate in hot weather (nylon stockings are not). But, when it gets near freezing, slacks and even jeans (in good condition) may be better. Dress shoes are not appropriate because they are bad for your feet when you walk long distances in them, or if it is icy or snowy. (They may, however, be worn for short periods where walking long distances is not likely.) For everyone, wearing shorts should be optional in very hot weather--especially when it is muggy. I don't, however, recommend shorts in very cold weather.
To me, there is nothing "Christian" about mandating suits for field circus. A suit is meant to impress. Cheap crap suits defeat this purpose. And, when you are selling a message, you are better off dressed similar to what average business people dress, not something that is 50 or 60 years out of date. Making a big deal out of such petty rules is not the mark of xians, but of Pharisaic Jews. Now, if the law (corrupted already by Christi-SCAM-ity), permitted, I would see nothing wrong with going out stark naked in warm to hot weather. If that was universal, and people were allowed to appreciate natural attractiveness, it would force people to focus on the message and not the quality of their suit or their starched shirt and tie.