Well it is Medieval in Thedas. Class structure society. Ferelden has no difference- just remind you Loghain sold elves to Tevinter.
Nah, that's not really medieval. Peasants are capital (and often military manpower as well), you only kill them when they really get unreasonable (see 'Jacquerie') or when they're somebody else's peasants in the case of war (economic warfare, really). Generally the average noble would try to protect his peasants (after all - revenue...), at least to a certain degree, or try to attract fresh peasants (mo' money) by offering various advantages to settlers.
Friction arose when nobles (or the State) felt forced to squeeze more revenue out of their existing peasants or economic difficulties (failed harvests etc.) made it difficult for the peasants to cough up the customary revenues. Then you sometimes got situations with peasants killing nobles and vice versa.
There are of course cases where a noble sexually harassed 'his' peasants' daughters or wives or do other kinds of mischief. However, outside those modern countries where rule of law is a thing even today a relatively poor person (or employee) has a very weak position versus a wealthy and well-connected one or his/her boss. It's the result of a major difference in wealth, power and influence; similar things could (and can) happen between a wealthy peasant and a poor one.
Otherwise, Masked Empire sounds like a decent franchise novel, just as the excerpt suggested
.