Competition is fine.  But this isn't selling TVs or cell phones.  This is a party nomination where only one person advances to the real competition (the general election).  This is more like picking your starting QB BEFORE the real competition starts.

Last year's 5-way race (damn judges petition rulings) was a perfect example.  The highly diluted field allowed someone without broad appeal (Glenn) to take the nomination with just 37% of the vote.  The result in November was predictable.

They really need to switch to instant runoff voting where there's more than 2 candidates in the race.  Until they have that, then the party needs to practice the age-old method of weeding down the field internally before the primary.  That had already happened last year until a damn judge decided to ignore the ballot petition rules.