So... with the introduction of incarnon's to, well no sugar-coating it, vastly inferior weapons that you use only for mastery fodder, wouldn't now be a great time to just delete disposition? There's little to no reason to focus on trimming numbers, if a weapon gets over-centralized, it's definitely not because of its disposition, and as we saw with Furex, popularity is meaningless to determine how strong a weapon's stats are when an augment is the only reason it's used.
As it stands right now, there's no reason to use a riven on Kuva Grattler or Phantasma Prime, as examples, because their stats are borderline the same as their base counterparts but have worst dispositions than said counterparts.
Most of the disposition changes are as different as taking one more shot of your weapon or one more swing of your melee, it's very silly to still have these complicated nerfs or buffs every 3-5 months, lol.