Dual wielding swordsman that ignores items unique passives?

Think of a bersrker champ who wields 2 massive great swords in each hand. Normally ppl would have to use both hands to wield one of those swords but not this guy. Thats how strong he is.

Anyway, what makes him unique is his dual wielding passive.

Passive: Dual Wield This champ can buy 2 of the same items while ignoring the item unique passive penalty.

All this means is this champ can by 2 and gain 300 percent crit damage for example. Or he can use 2 utilizing its proc twice separately on 2 abilities. Or 2 for 1.7 bonus ap.

Essentially, because he can dual wield so well, he can use each hand to activate unique item passive separately. He may even have 2 separate attack speeds for each hand. So Like item slot 1, 2, 3 will be for his right hand, and items slot 4,5,6 will be for his left hand.

I know this is op but he will have drawbacks

He will be like a Juggernaut. Slow and powerful. So his basic attacks/swings are wild and heavy throwing him off balance. So after every basic attack, he will stay rooted for 0.2 secs just so he can regain poster. He will have range like 200 tho. Remember, he has massive great swords.

His abilities can be a little like Yasuo Q. Meaning his Q can take different forms depending on how you combine it with his other abilities. Like Yasuo Q E combo.

Just a thought. If its op then he can have a damage reduction on unique passive like how yasuo has reduced crit damage.