There is one interesting question here: Is is harmful to the electoral process if there is far less of a perception of uncertainty about what candidate will win?

I'm not certain that there is. The modern political media largely follows politics like sports, and analyze whether a particular event is likely to be good or bad for a candidate, and such shallowness does not make the electorate more informed.

However there is a case to be made that more certainty would lower voter turnout, and that that would be bad.

I think that the only thing that could clearly improve our political situation is proportional representation and limits on consecutive terms.