1.5 years post op Lasik, my night vision is still bad and I see star bursting/ halos. Will I still see improvements?

At a 1 1/2 years out these symptoms are not likely to change. Glare symptoms are created by micro irregularities in the bed of the cornea created at the time of the original lasik. Custom treaents have resulted in much less of this problem, however, approximately 1% of patients with higher original prescriptions can still experience these symptoms. You are however, a candidate for Lasik Revision surgery in which custom laser application can be calculated to reduce the corneal light path irregularities responsible for these annoying symptoms. 

Generally, 18 months post-LASIK your eyes
will be fully healed and any glare/halos/starburst you see will not further
diminish on its own. Note that
some patients see things like this even before surgery; I am assuming this is a
new problem since your LASIK.
Wavefront is the most advanced type of LASIK and has the lowest chance
of creating such night side effects.
Still, as you can relate, it is possible to occur. Alphagan-P drops are helpful but are
not a permanent solution.
Sometimes patients can have additional wavefront LASIK treatment to
improve the quality of their night vision. You should discuss this option with your surgeon.

At your age, it is not normal to have
problems focusing up close.
Perhaps you are slightly overcorrected (farsighted) now? Your surgeon can easily measure to see
if this is the case. If so,
additional treatment could help.
When people hit their 40’s they develop presbyopia, an age related
change in the lens inside the eye which makes reading difficult. You are too young to have presbyopia.

Floaters
are not known to be caused by LASIK.
They are more common in nearsighted people, and this is likely the
reason you have them. They tend to
not go away, though with time people tend to notice them less.