Honestly, Horikoshi handles power ups better than Oda.
OFA reaching singularity and the 6 quirks were introduced several arcs before they were relevant. Oda on the other hand invents power ups right before the climax. Like asura and diable jambe, which were literally pulled out of nowhere. Or Luffy unlocking all 3 forms of advanced haki in the span of 2 arcs.