I took a break with WoW from mid Shadowlands till now. I remember on the optimizer page that there was a guide section that let you test out different talent combos and such. Is that now gone with the new talent trees or some other reason, or am I just stupid and they are hidden in plain sight and I can’t find them lol?
They are gone, unfortunately 
The new talent trees have so many different combinations that the talent view would not work very well anymore. We re-wrote the whole back end calculations of the website for dragonflight to accommodate the new talents!
Alright, that’s what I figured lol. It’s all good though, thanks for all your hard work over the years!