Sure they have had a dozen face lifts. Sure they live in gorgeous surroundings. Sure they do drugs and drink like fish. Sure they are not 70. Jane Fonda is 77 and Lily Tomlin is 75.
Stay with it. The first couple of episodes are a bit wooden but Grace and Frankie hit their stride by about episode 3.
TV gods, please let this be renewed for a second season! These two are funny!!
PS You can definitely see how make up can make Jane look old and haggard or very polished. (later in season)