Seems a little late as absentees and early voting is already underway. It is hard to picture either of these two surpassing Rubio as he is already close to 50% in a 3 way race. If Crist drops out, at least some would drift back to Rubio, not to the far left candidate. If Meek drops out, it might boost Crist some but probably not enough to win the most votes. It also would destroy Sink and the rest of the Dem ticket.
A lot of the Meeks vote would just sit it out...There is not much evidence a candidate can transfer his vote to another!!