Some elements of the current uniform is OK, but I am not a huge fan. Design wise there are, in my view, also some odd elements.
Though the balance between practical to wear, durable, not going out of style too quickly is difficult one to strike. In the sum of things the current one is not doing too badly.
Unless they do a big bang replacement, the extra cost of doing so is not huge, as there is anyway will a constant stream of new items being procured.