Thanks for bringing this editorial forward. I actually do believe that it is a positive thing for Bernie to remain in the contest for at least one more week. The discussion and comparison of policies is good for the Democratic Party and also keeps the GOP from receiving all of the press coverage. However, I am also hopeful that Sanders does modify his messaging so it does not exacerbate further tension in the party. It will also make it easier to endorse Clinton she does appear to be the likely nominee.
It would also be in Sanders best interest to reduce the questioning if he wants to remain a force within the Democratic party and keep his important chairmanships. Bernie benefited from caucusing with the Democrats and also because the Democrats needed him to pass the ACA. If there are 48-52 Democratic senators or 58-62 Democratic senators then he will retain some importance within the Senate. If the Democrats are outside those ranges then the effectiveness of a single senator is reduced sin they don't necessarily provide the vote to make a majority or override a filibuster.
Certainly the primaries along the East Coast will be interesting next week.
I do believe that Bernie does present some interesting ideas, but there are some personal issues that made it improbable that he stood a realistic chance of being the likely nominee for the part--even if the other opponent wasn't Hillary Clinton.