Wouldn't it be better to buff frozen heart instead of thornmail?

Both items are designed to counter autoattack champs but frozen heart the way that i view it is the healthier item, if the item was buffed it can used to delay the damage output on champs like yasuo, tryn and vayne without making those champs potentially die trying to kill you while also giving your teammates some more survivability too as their autoattack speed will be decreased.