A lot of things were added early on for testing and debugging or because there wasn't a system in place to handle something yet. Delta Zone is supposed to be a survival horror FPS with heavy adult content, but it is a game first. Systems are going to be added to make some aspects inconvenient and difficult to the dev's end goal. V key was never meant to be the system, but a way for us to dress and undress long before the clothing slot system was in place. Once that system was confirmed to work, V was removed. This is all alpha, meaning some core systems are not designed and in place yet. There is a lot more to come. Some thigns will make life easier as testing goes on and things get fixed, and some things will come in and make things harder, for example a new feralish enemy is aimed for next release. I'm sure that isn't' going to be a cakewalk with how that thing looks. Also the current crack is standard tier, not delta/investor so you are missing some cheats in the menu. Maybe people shouldn't have bitched at the person cracking...
To be clear, I totally agree that it's a very sensible thing to do in general and especially regarding combat mechanics, enemy behavior or stuff like that.
However, finished systems don't necessarily exclude temporary mechanics, especially on the QoL side.
The V key functionality may have been a temporary solution, but why delete it once the fleshed out clothing system was implemented? It is not strctly necessary anymore as the UI gives the player another way to un- and redress, but for convenience sake a key bind to full nudity (and back)
is useful. It doesn't really change anything (sfw-)gameplay wise (like making the game too easy).
In the end it's just a minor thing and is easily fixed in the future, so hopefully the dev sees the merit in it.