Unfortunately, questions like this are predicated on the assumption that Jesus is some sort of universal wisdom teacher.  The truth of the matter however, is that Jesus was a Jew, and he had a God-given task to assign in fulfilling the Mosaic law, and reconstituting a new Israel around himself.  That is to say: Jesus came (among other things) to end second-Temple Judaism. 
Since second-temple Judaism no longer needs ending, and since rebellious Israel has been judged (Jerusalem was destroyed in 70AD), asking ‘what would Jesus do if he were here today?’ violates the narrative flow of the biblical story.  Jesus’ prophetic ministry assumes his prophetic context.  Remove the context, and his ministry would have looked entirely different.  That is to say, we’re significantly changing the character by trying to transpose him to our context.
Do the people of God still need correction?  Sure.  But I don’t think Jesus would be announcing the end of the Church age (otherwise we’re in trouble) like he did for Israel--God keeps his promises.  He might encourage or rebuke part of the Church, but I have trouble imagining in any detail what this would look like since his story is so thoroughly interwoven with Israel’s story at ‘the end of the age [of second-Temple Judaism]’.
However, we can still in a sense, replicate (aspects of) Jesus’ ministry by caring for the poor and the homeless, rejecting all forms of violence, and living under the God’s sovereign rule.  To try and extrapolate more than this is, I think, dangerous.
Aaah, I’m rambling again.
My two cents.
-Daniel-