delericho
Legend
A number which is exactly the same for everyone, is a number that is unnecessary and adds unnecessary complications.
Hence, 5e's proficiency bonus which is the same for everyone in combat, is basically a null-zero rule...it adds NOTHING to the system.
The number is the same, but it's not applied in the same places for everyone - the Wizard doesn't add the Prof bonus to attacks with a sword, to give an easy example.
Nonetheless, it is true that the bulk of the class differentiation is done though the damage system - 5e could almost add the proficiency bonus to everything and it would make very little difference in how things actually played out.
In some ways, it's how people have viewed Stats in 3e to 5e...why do we even have them (actually, with 5e saves and such, I find stats far more relevant).
Why not, instead just use the bonuses...as the stats themselves are a null-zero value, in that they themselves add nothing, it's the bonuses that add something.
Yeah, the ability scores could go. However it appears that those six scores, and the numeric range of them, is one of the genuinely sacred cows of D&D.