My Hordady L-N-L also came with both rotors but I read the catalog descriptions and ordered the one not included. So, I got a spare rotor.
Get a powder cop die. It helps with making sure powder is in the case before seating the bullet.
I like to taper crimp in a separate operation from bullet seating. If you resize and load on the Hornady at the same time, you will need the powder through the expander powder drop tube so that the powder measure will sit over the mouth expansion station. That will give you room for both the powder cop die and the taper crimp die.
Unless you can figure another way to confirm powder dropped in the case.
You might consider getting an inexpensive single stage press to learn the basics on. All the other stuff you need for the progressive can be used on the single stage although the dies would need to be reset when converting back to the progressive.
Single stage presses are handy to have around to do odd tasks from time to time. A Lee O-frame or a used press found at a gun show would be pretty inexpensive.
Lots of folks say loading on a single stage press first is not necessary and maybe they are right. But after 29 years of operating a single stage press, I found a progressive had a steep learning curve. Lots of stuff going on all at the same time. It is easy to make a mistake.
Another suggestion for learning is to get a hand priming tool. Separate the loading into a resize/expand step, prime off line and then a charge and seat bullets step. Process the brass in large batches. I found the primer system to be the most troublesome when getting started. By priming off line, you take it out of the progressive equation on priming.
Once comfortable with the reloading process, then you can safely scale up your production and crank out tons of great ammo.
By the way, I still load my rifle rounds on a single stage press.
You will like the Hornady L-N-L