it hit a spot for me, continued some things set up in DS9 (closer ties with the Romulans) and added to it (telling us that Remans were used as cannon fodder - wonder what the Federation thought about that eh....)
They'd probably be more concerned about how, despite being enslaved to mine in caves and be used as cannon fodder, the Remans...
A. Managed to build a ship with more firepower than the Ent-E, more advanced cloaking technology than the BoP prototype and house a planet annihilating weapon BEFORE the Romulans did.
B. Find the time, resources and technological know how to build a secret base to build said ship.
C. Discover Thalaron and weaponize it to such a degree that they can selectively kill everyone in a single room to destroying a planet's entire population.
D. Gain the medical expertise to not only pick up the 'abandoned' Picard Clone project, but also gain the knowledge to see the medical procedure through.
E. Decide to wage a genocidal war against the Federation.
F. Gain control over the entire Romulan Empire.
F. Follow a Human clone as their leader who will kill his fellow Reman officers who failed to notice something that he himself also failed to notice.
This is why I like Khan. He only had a handful of his people to help him gain control of the Reliant and had to steal the Genesis Device in order to gain the upper hand on those who would oppose him. But even with that, he didn't know fully how the Reliant worked and lacked the experience that would have given him the edge he thought he had over Kirk.
Shinzon just gets a super duper ship with a bunch of "i win" buttons and only fails because he's so incompetent at everything.