Would I benefit from Alar Base Reduction?
The picture do not tell the whole story. When evaluating alar bases, we like to have the benefit of a 'worm's eye view" meaning the patient looking up which gives the best shot in order to evaluate the width of the nares/alar bases. Good luck
I cannot tell from the limited photo view available. At a glance I would say perhaps a small wedge resection is all that is needed and can be done in a way to even up the nostril sizes. I would not do any sill work.
Revision rhinoplasty after umbrella graft
It is impossible to comment based on the limited picture since nasal aesthetics must be addressed in the context of the whole face. Wedge excision (Weir excision) works well for those noses that would benefit from alar base reduction. Be sure to consult a surgeon certified by the American Board of plastic surgery. Insist on reviewing a comprehensive portfolio of pre- and post-op pictures so you can see the types of results that are reasonable to expect.