Items reforged - suggestion for riot

As we all know, balance in this game rn is a trainwreck, Some say tanks are too powerful, others say supports and others say adc....personally i feel its ALL of these classes causing issues, but we cant just blame the poor champ balance, items play a role aswell....so i would like to go over an idea i had that will help stop all these classes from being dominant - warning, tons of text, continue if you dare

Legendary items - This will the ultimate item tier, with all items now costing 4500 gold and having stat adjustments, in addition to being very gold efficient BUT, a player may only have 1 legendary item at a time and no more

500 Health 400 Mana 50% Attack speed 40 Attack damage 20% CDR 10% Movement speed passives remain the same as the are now

100 Attack damage 40% Critical strike chance 25% Attack speed Passive - Critical strikes ignore 25% of the targets bonus armor Passive - Critical strikes cause a target to bleed for 150% of your attack damage over the next 3 seconds

80 Attack damage 40% Critical strike chance 40% Attack speed 10% Cooldown reduction Passives remain the same

140 Attack damage 40% Critical strike chance 20% Life steal Passive - Heal for 20% of damage dealt on Critical strikes Current passive also remains

60 Attack damage 60% Attack speed 15% movement speed 10% life steal Passive - Attack speed increases by 8% every time you attack a champion 12% for melee (stacking infinitely) losing half stacks upon switching targets, (drops 1 stack per second while out of combat increasing to 5 per second after 4 seconds) Current passive remains

2000 health 20% CDR 250% base hp regen Passive - While in combat with champions you gain 5 armor per second (halved for ranged champs) and half that as magic resistance, capping out at 10 stacks, upon achieving 10 stacks, take 20% reduced damage and heal for 20% of your max hp on a takedown (heal has a 10 sec CD) Current passive remains

150 ability power 20% CDR Passive - Your abilities deal an additional 40% of your ability power as bonus damage on hit (6 sec CD on each ability) Current passive remains

200 Armor 500 mana 20% CDR Passive - Basic attack and Abilities on champions Apply frost to a target, upon achieving 3 stacks, the target becomes brittle (causing the next cc ability they recieve to have its duration extended by 30% and deal an additonal 10% of their max hp as magic damage) Current passive remains

100 Armor 100 Magic Resistance 500 Mana 20% CDR Passive - Your abilities deal an additional 20% of your armor and magic resistance as bonus damage Current passive remains

I know theres a few more items i would like to cover, but you get the idea here, Legendary items do more to enhance the game for you, but you may only have 1....I feel this could IMMENSELY help the balance issues league has, as items can easily be tweaked without having as much of a backlash