Beverly Gee

I really like this show but am becoming more confused as it states Angela Bassett is the star but increasingly it seems more like Aisha Hinds is filling that role. I actually would have given 5 stars if I had stopped at the end of season 4 before it became mostly about only 1 person on this " team". All of a sudden Hen can make complicated diagnoses on the spot that would take specialists a hot minute while also covering as Captain when needed or as Detective to expose serial killers all while her only formal training is as a paramedic. Not nearly as much happening with Angela Bassett or even the rest of the cast. What gives?