Best advice for that? Is to do neither. Very few authors can info dump well, and fewer can set up exposition that isn't painfully obvious that it's exposition. I say just drop the reader in, Dune did this really well and if there was a point that needed explaining it was done though character...
Seriously? Stereotypes are hard to be broken? No they're not. You can have a protagonist that has emotions, just make sure they don't have only one and become a melodramatic character. Just make sure the emotions are appropriate to scale and place, that is the emotions are appropriate for the...
If you're worried about genre blending, then don't. You can have elements without pigeon holing your story into one or the other or a mashup of the two. Pull elements you want in and disregard the genres, they're marketing terms anyway. Write and combine what you will. :)
During the 19th century weapons like rifles and muskets were known to overheat. Cannons less so but still might overheat but keep in mind that they would take more time to reload and would have breaks in the firing based on assaults in sieges, charges, etc.