I have to disagree with the people calling the opener filler. I think it's going to turn out to be important to see exactly what the synths were doing before and during the Mars attack.
It's better to show than tell. The problem is the writers already decided to pretty much tell us all of this in the first episode, so showing it in the second episode is somewhat redundant - minus the "eye glitch" thing which seems to suggest they were all hacked.
Similarly, the Zhat Vash infodump at the beginning of the episode was fairly quickly rendered partially useless because later scenes in the episode conveyed the basics (that a group of Romulans who hate synths are behind all of this) much more effectively.