An election reformer in Maryland advocates for blanket primaries and instant runoff voting (Final Five):

"With ranked-choice voting — the voting system preferred by most democratic reformers — voters list candidates in order of preference. Ranked-choice voting reduces strategic voting, where voters won’t vote for their favorite candidate if their second favorite is more likely to win; that is, it allows voters to vote sincerely without paying a penalty. The result is that more candidates and parties are willing to compete.