Will Columella Fullness Subside with Time?

The fullness you are experiencing should improve with time. The tip/columella is the last area for the post-operative tissue swelling to resolve. It can take up to about a year to see the swelling return to normal.

Check with your surgeon to check to make sure everything is healing as anticipated otherwise.

It is usually best to wait between six months and a year before contemplating any revisions.

Revisions in this area are usually straightforward.

Patients must always be realistic, particularly with tip fullness and the overall size of the nose.  Noses that were once very large will not usually look good if they are made excessively small.

It's a bit early to discern swelling from the final result at this point but you may be needing that to be looked at. Revisions aren't done until a full year afterwards typically.
The incidence is about 6%. Be patient, the need for a revision will be determined by your level of dissatisfaction as well as the result.