Except Rubio has horribly out of touch positions that the Democrats can mock like they did with Romney AND still attach him to Trump AND he also has a very sketchy history in Florida.
Rubio's "out of touch" positions break back down into the simple left vs right political argument that empowers the elections and this very forum, so, can't comment such a broad subject here.
His character can't be attached to Trump and I'd argue a majority of national voters couldn't connect Donald and Marco. His history in Florida is for him to defend, whether that's sketchy or not is debatable.