OP- Your Whyte is more than capable and has fairly modern geometry so is it just an itch for a new bike that needs satisfying? It’s not forward like the Cotic but it’s fine.
But yeah – slacker, longer and lower tends to be more stable going down as well as put you in a good body position. Obviously theres a middle ground as too slack will be an issue.
I’m not sure how it’s taken so long to get this geometry. Even 10 years ago dh bikes weren’t as slack as they are and were riding similar tracks (maybe harder). You would think some manufacturer would have done some testing at opposite ends of the spectrum and find an optimum balance instead its always been incremental changes. maybe so they can create product life and have something for the next model.
We’ve never had it so good – I struggle to see where we go tbh