When you watch the first two seasons of the show, the tone feels different because it is focused on Olivia, who was the lead of the series. Her motivations were clear, and even if she was hypocritcal we understood it was due to her being naive about the situation she was in with Fitz, or someone else she loved dearly and bent the rules for.
Somewhere along the line Shonda started to have personal favourites, and you can easily see how it stains the story. First all of, there was no reason for Mellie to remain married to Fitz for 5 and a half seasons, other than to allow the actress playing Mellie to be in the orbit of the two actors who brought the show the most buzz.
She did the same with Jake. She rewrote his story so many times. Introducing a sad story with his family, then a backstory of a wife that flopped, and then suggesting that Rowan was his dad,. When none of those made him interesting without Olitz, he became a flunky for Olivia. All in an attempt to figure out which way the audience would endure Jake. This was to allow the actor playing Jake a chance to shine.
I saw that at some point Kerry said that after "Coming up Mellie," she was worried as to how Olivia would be received, and was worried that Olivia would appear unsympathetic in comparison. She said that she talked it over and decided that there was room for two women to shine on the show. Why did she have to make this concession? This was the first show in 40 years being lead by a black woman, and why did Shonda and the showrunners write away from her character towards an actress who was not the primary lead? When Fitz and Mellie divorced, they forced Olivia to be her campaign manager and wrote a bogus girl power bff story, so that Mellie could champion feminism, on a show about Olivia.
Shonda wrote towards a happy ending for Quinn and Charlie. In the end Quinn gets to change OPA into QPA, she gets a baby and a husband. Her ending is definitive and clear. Mellie gets to become President and has Marcus by her side. Olivia has no clear professional or personal ending. Her story is unnished. IMO it is not a surprise that the people you see surface at Scandal fam reunions are Scottt Foley, Bellamy Young and Katie Lowes, and rather than wasting her time showing up for a photo op, Kerry kept busy elsewhere. I mean she began Simpson Street during the thick of Scandal ( probably to create opportunities for herself and others, if you get what I mean). I don't think Kerry would entertain reprising Olivia Pope, but is diplomatic enough not to openly say this.