Dorian's Blade Needs a Unique Passive

Too many games I see carries and junglers stacking dorians blade and getting bloodthirster levels of healing and tanks level health stats. Why can Dorians blade stack and not dorians shield? Which dorians shield is the worst of the three. It is blatant favoritism of a damage meta. I can even prove it with the recent item additions mainly being assassin based lethality additions. Not one defensive item has been changed or altered to help against damage except maybe for the randuins buff which was only a measly 10 armor.

Make the lifesteal a unique passive already. Im tired of seeing an adc with 14% lifesteal off only runes and two to three dorians blades.

The vaule of stacking dorians blades counteracts the selling debuff to the item pathing of how many dorians blades you have purchased. + 8 attack damage +80 hp and +3% lifesteal stacked three times equates to +24 attack damage +240 hp and +9% lifesteal for only a measly 1500 gold. A phage cost 1250 gold and only gives you 200 hp and 15 damage with a small movement speed buff that is pretty small. Now how is it balanced to buy three dorians blades instead of doing an actual item path. The advantage of stacking dorians blades early for cheaper and better stats just ruins the state of the game.