And God awful after Kate Jackson's departure. That is because, in the beginning, you had 3 young women who complimented each other: Sabrina was the brains and the elegance, Jill, the modern, athletic, all-American beauty and Kelly, the street wise beauty with a troubled past.
No better is this dynamic exemplified than in the classic "Angels in Chains Episode". While in prison, Kelly clashes with the guards. Sabrina orchestrates the escape while in the sheriff's car and then comes up with thee idea of the gasoline to throw the dogs off their scent. Finally while the Angels are being chased in the pick-up, Jill climbs her way to the back to throw the bushels of potatoes at the sheriff's car while Kelly exclaims "sometimes I worry about her!".
Sadly, once FFM left, the group not only lost its most charismatic member, but, more importantly, it lost the only real athlete of the group. Cheryl Ladd was a capable actress, but was obviously brought aboard for her physique and blond hair. Watching her run was just too painfully funny. No longer would the Angels have that someone believable capable of playing tennis, performing roller derby, riding a skateboard and hanging out the side of pickup truck.
While the show lost it's edge after the departure of the inimitable FFM, it still managed to be watchable for the next 3 seasons until Sabrina's departure. Kate Jackson always lent an air of believability to the silly goings on. When she left, the Angels lost their de facto leader. They needed to replace her with a decent actress who could play the role of the sophisticated, wise Angel. Instead, we were given the mindless Shelly Hack. I stop watching pretty much after a few episodes of that 4th season, so I couldn't even tell you anything about Tanya Roberts tenure.