Saw the first episode.
They are either moving too fast to tell a good, detailed story, or too slow because they are trying to create drama in the wrong places.
I can't decide.
It looks to me like they put together a demographics checklist, then tried to build a story around it.
--Strong fighter / one-man-army to appeal to men: check
--empowered woman / virgin who needs no man, to appeal to the femminists: check
--cute young hearthrob for the young-teen girl set: check
--ancient setting with enough historical background, to appeal to the history channel watchers: check
--power-mad senators conspiring to kill the popular Ceasar, to appeal to disgruntled politicos: check
--plot........ nevermind that, we have a hit on our hands!