Yes ... It should have been evident, almost as soon as Pluto was discovered, that it was not the Planet X predicted by Percival Lowell (who left funds to continue the search, leading to Tombaugh's discovery). Pluto is much smaller than a planet in the Jupiter-Saturn-Uranus-Neptune sequence should have been.
I wonder if other Kuiper Belt objects could have been discovered from the Lowell Observatory photographic plates if the search had continued. Presumably so.
With the change in nomenclature, Tombaugh becomes the discoverer of the first Kuiper Belt object, which is arguably more important than being discoverer of just one more planet.