I agree 100%. But I think this is supposed to be a fun project, like, making a remix of a song. Even without considering the stellar (original) cast, it will be next to impossible to recreate the atmosphere from that particular era.
We've discussed hundreds of what-if scenarios on the old forum, and now we can have an alternative Dynasty version.
I'm not saying that they will use any of those suggestions - probably not! - but it's possible, and that's what makes it so exciting. What part will be the same and what are they going to change? How will it look? The fun of comparing things.
Personally I'd struggle with a continuation, that could only work for Dallas simply because John Ross III has always been such an important part of the original story, unlike the Carrington and Colby kids.
Bringing back the old cast? I prefer to remember them the way they were, instead of watching the "Shady Pines" versions.
Then there's the issue of S9 vs. mini-series, quite a mess if you ask me.
Nobody's interested in watching a grown-up Krystina or Danny (who were they???) and the Alexis we knew...she's gone. Thankfully, Joan Collins is still alive and kicking, but not so kicking, if you know what I mean.
That doesn't mean I'm not concerned at all. I plan to enjoy this, but something like miscasting could sabotage that, so at least we should be prepared for a little challenge.