I'm not a boxing expert, and sure Manny knows best. But I already said this statement since Pacquiao - Marquez 2.
Manny as the harder puncher between the two should initiate an exchange. Marquez masters the IN and OUT strategy of Pacquiao, Marquez is also comfortable with Manny's Left straight + right side lateral movement. If Manny still do those moves, this 4th fight will just be the same as the 2nd and 3rd fight.
In my opinion Manny needs the IN - Stay - Throw.
If Manny comes in sure Marquez will counter it, If Manny will stay inside and try to accept the counter of Marquez, Manny will have a much higher chance of connecting his power punches.
I want to see the "BARA-BARA BAY" style of Manny Pacquiao. The strategy why almost ALL of the Filipinos love boxing!