Build Diversity is easy to judge by just reading the material (or some guides), and I'd say that PF2E competes with D&D 4E quite handily there if you ignore the diversity that gets added by Paragon Paths and Epic Destinies.
If you want something like Paragon Paths and Epic Destinies, then you can just use the Free Archetype rules - having a second progression track of class-like features should feel pretty familiar!
With Free Archetype in play PF2E has IMO very high build diversity.


It's certainly true that PF2E does not have the same type of Crowd Control that D&D 4E has.
Neither did D&D 3.5, nor does D&D 5E, nor does PF1E. 4E was pretty unique in that regard.
You can play a Defender. Whether that is simply by picking up a Champion and using their defensive/retributive Reactions, or by using the Shield Warden feat to protect nearby allies, or by playing any martial character and making use of Trip, Shove, and Reposition together with Reactive Strike.
There is also another Defender-oriented class, the currently-in-playtest Guardian. It'll hopefully get a few improvements in it's actual release, but it's certainly more oriented towards being a Defender than any class in anything D&D-adjacent outside of 4E.