Revision rhinoplasty takes time to assess

I had my Rhinoplasty revision surgery 3 months ago to replace silicone implant with ear cartilage. My surgeon used my septal cartilage and ear cartilage to build my tip, and ear cartilage to augment my bridge. And the problem is, one side of my nostril is slanted while the other straight. And my nose does not look great at all with flat bridge and round nose tip. It was almost perfect to me at one month post op. It seems to me that my nose tip was shortened and more rounded during the healing (or even maybe reabsorption).

I want to add another layer of autologus material over my ear cartilage. Is it necessary to take out the ear cartilage and put it back again? I am afraid by the time when I do the revision surgery, the ear cartilage will already grow firmly with my nose bone and it will be traumatizing to my nose to seperate them by force.

Also, if I were to have a third surgery in future, will it be a danger that my nose is going to collapse? I heard that too many surgeries will make your nose weak and leading to collapse. Since my surgeon has already used my septal cartilage as a base to build my nose tip. Will my nose be prone to collapse? What will be the sign in terms of appearance when the nose is collapsing? Thank you.