As I wrote an article on this mather I think McGregor has chances in first 5 rounds although those haymackers like in MMA are possible but not probable. In boxing fighters are much more concentrated on punches because there are not other attecks.
We have to admit that Conor is much stronger compared to Floyd and therefor Floyd will dance around ring to avoid those strong attacks. In later rounds he will become attacker...bad for Conor.
As I am big fan of Connor I wish he could win but Floyd showed His skills during long and succesful career.