Hi Everyone! I would need some advice for my two plants...

My Olive plant was doing poorly and shedded all her leaves. I found a good bunch of roots had rotten, so i cleared the rooted roots and planted her in some fresh soil. Her crown still remains bare but theres a happy shoot form her base. Would the crown recover or should I just shear it off?

My second plant - dracaena - was showing signs of distress. Her crown was all floppy and I read it would grow back if I had pruned off the entire top! But its been a week and now I'm still left with two stumps! Help! Is it dead?