I note from the spec sheet that this is a non-sanding primer. So, question is...how can I straighten out the bad spots and improve overall leveling of the primer before moving on to the topcoat?
Just means that you CAN top coat right over it without sanding IF in the recoat window of that primer.
Sand out you bad spots and scuff the rest with a red scotch pad,clean off with wax & grease remover,Reshoot another primer coat and paint it.
If the bad spots sand out ok with out cutting thru,block out the rest and clean,paint.
Question will be IF the primer LOOK'S smooth enough for a color coat. That will determine WHAT to do next.