The only value, that turn guns into blurry mess is “weap_dofNearAmountPercent” and it is 2.0 for every gun by default.
So devs, pleas add simple toggle setting, that overrides 2.0 to 0.0 for every gun in player’s inventory, so with this option toggled on player will see this:

Instead of this:

Moreover, because override is not in the “cutomProps” if gun later was picked up by player with this option toggled off, he still get his blurriness.