It is a different system because the mechanics are completely different. Sure, upgraded doors are not exactly special, but as I said in my post (which I recommend you re-read), the heavier doors will open slower and take much longer to unlock, so even if they have more HP they are harder to use.
As for the locks themselves, the simple lock requires the player to run around with the key, and if they die they lose the key. The keyless lock will be one of those american twisty locker locks, which will mean you have to enter a code every time you want to enter the base (or maybe 1 time only, like in Rust). The keypad lock will be faster and more secure than the keyless lock, but requires a digital code or a keycard (keycards can be stolen off of players but are faster to use than the number-pad on the keypad lock). Finally, the facial recognition scanner is the fastest, but can be hacked, but the plus side is that it is very fast and secure.
In terms of the breaching mechanisms I suggested; they are completely different and unique. The drill will be silent but it will be slow and can easily break. The picklocks require advanced picklock skills, sort of like in SCUM, which will be cool. As for the hacking device, it can be like a cool computer and you have to know what you are doing.
All of these are cool and unique mechanics as I more or less described in my post. Next time, please actually read my post before posting such replies. Thx!