Pulling Down Upper Lip Causes Nose Tip to Plunge?

Your nose may get a bit thinner but it will likely stay deviated.  As others have said it is important to diagnose the cause of the deviation.

Nose pimples are not uncommon after rhinoplasty, especially in those with thicker oily skin.  Cleansing is good, Avoid excessive taping, and talk to your surgeon about a course of acne antibiotics

There is no questions that the skin is compromised.  did you ever have any injections (silicone or ArteFill) to that area?  you should see your surgeon

What is the "Best" option for augmenting the nose? You will not get agreement amongst surgeons to this question! With that caveat out of the way, I'll give you the opinion that I've held for more than 5 years: Diced Cartilage (your own cartilage) Wrapped in Fascia (your own...

There are a number of good options for correction of pinching and collapse - the best options depends on whether your breathing is also compromised - some of the techniques are more cosmetic while other also improve breathing

Yes, you may get improvement with cartilage grafts placed along the nostril rims. However, do not expect perfectly symmetric nostrils as you will likely be dissapointed.