Then I'm not sure why you can equate this game to any other. You also DO have the ability to holster the weapon, it just isn't visible.

There are also much more variables this time around as I described that go beyond just body sliders and weapon sizes.

It's beyond just whatever fanboyisms you seem to be implying. If it isn't there there's obviously a logical reason the developers left it out. It obviously didn't work this time around with whatever build of the game they put together, and whatever mechanics they have in place now. Some people are capable of looking at the lack of a feature as more than just "wah why wont they just put it in, this svcks" and are actually able to make sense and come to terms with the many potential reasons why it just might not be there anymore.

Again, with everything as different as it is, I can understand some of the possible reasons why they have decided not to include it this time. This isn't Fallout 3/NV, this isn't ESO, or Skyrim.

Bethesda already come with a solution for the cliping problem

https://twitter.com/ItsameDennis/status/663393520460423168

Do they have to be holstered? Can they not just have a stance toggle so you just lower your weapon to a relaxed state when not in combat?