expanse had some problems, i think one of the actors was ejected due to being a creep of woman. and then the books take place in the future, so it dint make sense to make a series so soon in post season 6, i heard.

i cringe at the 8episode per season arcs, its the studios execs trying to save money because they spent too much on a-listers, theres no harm in using other actors that arnt super famous, rare exception is STD the (nobody actors were just not that good for the show)