again, that would be the type of stuff that’s in a game guide, not a manual, so you can’t really demand devs do that because it’s never been the norm
also, even that completely ignored, that specific example is pretty basic “already visible to you ingame”, you’re perhaps just missing it or it’s not presented in the exact format you want
your stuff ingame is already telling that your gun has a lower attak per second base scaling than a different weapon or “empty hand”
that means when you have 10% attack speed bonus (which is static/fixed amount) that will the scale differently because the base speed is different between the two items used.
again, you might not think the format is presented proper to you “but it’s there”.
And what you really want is a game guide: compiled by the community (not talking build guide), and a game manual is what the devs have provided just as usual, providing just basic game info to get you started.