I'm one of those who firmly thinks that Powersaved legends do not affect the competitive scene. Let's talk about Landorus-T and Thundurus for example, since it seems like you have something against these mons.
Landorus-T usually holds a Choice Scarf or a Choice Band. Great. What kind of perfect IVs does Lando-T need to perform with this item? 31 Atk and Speed IVs. Nothing else in my opinion. You may have a lower roll for any HP Ice or Ice Beam because you don't have 31 IVs in SpD or in HP, but Lando-T is not supposed to take any Ice type attack in the first place. Furthermore when you EV train your pokemon to get an OHKO on Landorus-T with an Ice Beam or HP Ice, you test the damage on a 31 HP / 31 SpD IVs Lando-T.. that means you can have a flawless Lando-T or not, but you won't be able to take that particular Ice type attack.
Oh and i forgot that legends in ORAS always have at least 3 perfect IVs. But Lando-T just needs 2.
Thundurus has two strong viable sets: bulky Sitrus Berry and offensive Life Orb. For the first set, all you need is 31 HP, Def and SpD IVs. Which is 3 perfect IVs. Hidden Power Ice? Raphael Bagara (2nd place) and Wolfe Glick (8th place) used a HP Ice-less Thundurus in their teams. HP Ice is a great move on Thundurus, but it doesn't affect it's role of supporter too much. The Life Orb set only needs SpAtk and Speed IVs. It needs HP Ice, yes, and this might be hard to obtain, yes, but we eliminated so many variables thanks to the fact that we just need SpAtk and Speed IVs that you can also close an eye if you really want an HP Ice Thundurus.
I'm not taking in consideration Natures, because of the Synchronizer trick which gives you 50% chance to have the correct Nature.
These are just two examples of popular legendaries that in my opinion don't really need to be powersaved to perform at their best in the competitive scene.
Now let's suppose that Powersaves do not exist. Wouldn't it be unfair for those who want to play in the competitive scene but don't have much time (because of work, school and so on) to soft reset for days, searching for a Timid HP Ice Thundurus for example? Wouldn't a system like this be even more unbalanced?
I'm sure Game Freak is aware of this situation and will deal with this problem in the future. The competitive scene of this game is getting more and more popular and i hope to see the introduction of a new breeding system (or a new "machine" to fix IVs if you give it particular in-game items, maybe?).
Landorus-T usually holds a Choice Scarf or a Choice Band. Great. What kind of perfect IVs does Lando-T need to perform with this item? 31 Atk and Speed IVs. Nothing else in my opinion. You may have a lower roll for any HP Ice or Ice Beam because you don't have 31 IVs in SpD or in HP, but Lando-T is not supposed to take any Ice type attack in the first place. Furthermore when you EV train your pokemon to get an OHKO on Landorus-T with an Ice Beam or HP Ice, you test the damage on a 31 HP / 31 SpD IVs Lando-T.. that means you can have a flawless Lando-T or not, but you won't be able to take that particular Ice type attack.
Oh and i forgot that legends in ORAS always have at least 3 perfect IVs. But Lando-T just needs 2.
Thundurus has two strong viable sets: bulky Sitrus Berry and offensive Life Orb. For the first set, all you need is 31 HP, Def and SpD IVs. Which is 3 perfect IVs. Hidden Power Ice? Raphael Bagara (2nd place) and Wolfe Glick (8th place) used a HP Ice-less Thundurus in their teams. HP Ice is a great move on Thundurus, but it doesn't affect it's role of supporter too much. The Life Orb set only needs SpAtk and Speed IVs. It needs HP Ice, yes, and this might be hard to obtain, yes, but we eliminated so many variables thanks to the fact that we just need SpAtk and Speed IVs that you can also close an eye if you really want an HP Ice Thundurus.
I'm not taking in consideration Natures, because of the Synchronizer trick which gives you 50% chance to have the correct Nature.
These are just two examples of popular legendaries that in my opinion don't really need to be powersaved to perform at their best in the competitive scene.
Now let's suppose that Powersaves do not exist. Wouldn't it be unfair for those who want to play in the competitive scene but don't have much time (because of work, school and so on) to soft reset for days, searching for a Timid HP Ice Thundurus for example? Wouldn't a system like this be even more unbalanced?
I'm sure Game Freak is aware of this situation and will deal with this problem in the future. The competitive scene of this game is getting more and more popular and i hope to see the introduction of a new breeding system (or a new "machine" to fix IVs if you give it particular in-game items, maybe?).