Ollie, Laurel, Mom, Sis, Tommy, Dig, Harry Dresden equal a cast of seven. With the three new additions for season two that brings us up to a cast of ten.
That seems a tad too large and unwieldy to sustain. The show already strains hard to give Laurel/Mom/Sis/Det. Lance something to do in each episode.
I'm thinking a couple of the original seven get cut to reoccuring characters next season, or possibly one or two get killed.