TOO OP
to explain why this is BUSTED, imagine a unique that is decent, it has a bunch of powerful effects - but that is balanced by a negative effect
Eg. +100% attack speed but 30% less damage
Now if you remove the negative stat suddenly you have a MUCH more powerful item
and if this happens ON TOP of extra potential being gained, it could very easily lead to items becoming impossible overpowered
In the game there are already items like this,
Titen heart(you cannot regen life, if removed becomes very powerful defence item with no negative and also an increased damage mod), Aarons Will(the you cannot summon skeletons is removed, so you have an army of skellies on top of powerful bone golems), Bolderfists(removes you cannot leech, which makes the item actually usable instead of trash), wing guards(remove you cannot crit, which would make this a BiS for ANY melee build), Sacrificial embrace(crits dot do extra damage, if removed this item would result in a +10 to +100 to void spells without a downside, making it BiS for long cooldown void spells) Azzurals fury(removing the you cannot regen mana affix), Stormtide(shocks you), Solurons step(negative phys res), last steps of the living(chills you), pact severance(does not autosacrifice minions anymore), Culvinars claim(autoconverting ALL mana into ward is quite annoying), deaths embrace(consumes your life/extra mana on grim harvest, these are separate affixes) draalsting(less attack speed), Lament of the lost refuge(stacks removed when you use a movement skill), Laviathan carver(cannot avoid crits) aberrant call(health loss of minions over time), plague bearers staff(life drained per second), Close call(reduced block effectiveness), lifes journey(life lost per second), grimroire of necrotic elixers(life loss per second on potion)keltham blasting agent(less decoy duration), Silvafrond(extra cooldown for summon vines, turns it from absolute garbage to situational), bleeding hearts(bleeds you on spell cast, less regen) gamblers fallacy(less crit if you recently crit), chimeras essence(reduced all res while transformed), Xitharas conumdrum(cannot leech, cannot regen) Serpents milk(minions do 90% less poison damage, the one affix that makes this item UTTER TRASH, would result in this being good in some niche builds), Singularity(you cannot do critical strikes)
THE WORST OFFENDERS
Ravenous void(already a crazy good item, the removal of the taking void damage and disable void barrier generation affix would result in it making you even more tanky), Morningfrost(BiS for phys/cold dex stackers, would lose the negative of lowered resistances, making it even more OP), Roots of vithrazil(you cannot move in spriggan form, on a high tankyness item, results in you being almost unkillable while you run about with no negative), The slab(reduced block chance, this can result in a 50 or so percent chance of 0 damage taken when class passives and the legendary potential affix get added in) Cradle of the erased(stack lost on block, resulting in 61% block chance from the shield alone), , apostates sanctuary(can be used to generate a ton of ward, but has two VERY bad negatives, without the one that gets rid of your ward, you can use it to make a insanely tanky build by just stacking phys res), Throne of ambition(loses stacks if you go more than a few seconds without a new stack, if this is removed 40% more fire, cold and armor constantly once this is capped)
and a funny one
Eterras path(summoning a ton of vines, which is just annoying and gets in your way)