Epic sea battle! (so far so good)
Orc washes up on shore (seems less badass than usual)
Human makes spear (good thinking there)
Orc and human see each other and fight (so far so good)
Panda shows up and with a lot of flashy moves easily kicks both their asses.  Both look dazed and confused. (queue rest of post)

In the past, the cinematics gave some sense of the enemy to fight.  In the original we had the factions and the Burning Legion.  Burning Crusade gave us Illidan and introduced the new races, without either stealing the spotlight entirely.  Wrath of the Lich King gave us Arthas showing off his power while his father's words echoed in his head, perhaps giving us insight into the madness and evil within.  Cataclysm had Deathwing blow up the world.

And now... who is the enemy?  The panda?  He does seem to be what we fight.  And against the panda we are helpless.  Utterly helpless.  Two of the three core races (belfs as third) are in a hopeless fight for survival in an unknown world, a world manufactured entirely for the pandas, and the pandas rule here.  There is no place for the old ones except as comic contrast to the shiny and new.