I fully hear everything you're saying, and this is why so many of us wanted desperately to have TAT in the reboot. Val deserved some justice. She never really found peace.
But, I have to say, though I hated the Saintly Beige Kelly of the Baby Voice from season 5-9, I appreciated that characters grew and changed. That's actually how life works - no one stays the same. Kelly's transformation was a bit ham-fisted, but I enjoy her as a bitchy ice queen in season 1, and a more level-headed armchair psychologist type in season 10. And Donna had no personality to speak of in the early seasons - that's why they relied so much on physical comedy bits to flesh out her character, and why that giant red dress made a comeback on the plane in this ep. Dylan actually summed up Donna's transformation best in the ep where they bury Dr. Martin. It's one of the few scenes Dylan and Donna ever had together, but it's a series highlight for me.
Now that I'm thinking about it, I'm incredibly sad we will never get a Luke and Tori scene. They always played off each other so well when given the opportunity.
And as for Val, well, whatever the writers intended, it backfired. I was a loyal Kelly fan til season 5. But they didn't manage to make her sympathetic - ESPECIALLY where Val was concerned. For me, it looked like Kel was insecure, jealous of Val, terrified of what Val knew about her, and generally filled with self-loathing. Valerie basically held a mirror up to Kelly, and Kel didn't like what she saw. What did she do to Val? Slut-shamed, accused her of bad behavior, labeled her manipulative - ALL things she herself had endured in high school.
I'm not even sure if the writers were aware of this, but it was glaring to me. Donna was a straight-up angel but also kind of a dim-wit especially where Ray was concerned, so I was never too mad at Val for the Ray thing.
Anyway, I think Val was the richest, most complex female character they ever wrote, and I'm still waiting for her to have the ending she deserves. I'm not giving up hope yet - I think this show is going to get another season, given its numbers, so hopefully TAT comes back next year.
And I cannot stress this enough - the 90210 original finale from May 2000 is beautifully done. I sincerely hope the focus continues to be on the fictionalized actors, and not on new plotlines for the original characters. I will NOT stick around if they begin rewriting history. I also refuse to enter into any realm where we have to "kill off" Dylan McKay to explain his absence. We have all endured enough recently.