Yeah, that would be much more convenient. As a former recruiter/leader of multiple clans, I can personally say having this function would be convenient. It's not necessary to be implemented, but it certainly would save some time and be much easier than having to go on the forums and manually promote them from unranked to trial or whatever.
It would be a relatively easy fix as well. Somewhere in the code it's bound to determine that "unranked" is the default rank. There could be a button next to the rank you want to make the default rank, and when it's checked, it changes "unranked" in the code to "Whatever Your Default Rank Is".
i am not a professional coder but I have some basic knowledge so pls don't hate