This will probably be very hard to put in the game. I say this because the bugs that have been in the game for atleast the past 3 versions would have to be fixed, and more.

Well, now in 1.31 you have to reload every weapon after you pick it up. We can make the unarmed secondary option useful if you didn't have to reload a gun after you pick it up.

So... maybe we'll be seeing this in Soldat v5.0?

Reloading a weapon after picking it up was implemented as a bug fix, to stop guns jamming after picking them up. This will have been for naught if this idea was to be added.