Lots of good conversation and varying opinions. When I submitted the OP, I didn't expect much reply.
I define a turret press as one that the dies are mounted on a turret - not the cases. AND, only one die is engaged during the press stroke. That would seem to be a pretty straight forward definition. Heh, we'll see. Nothing surprises me here.
My Dillon BL 550 came late yesterday afternoon. I got it mounted on the bench atop a strongmount (nice assessory, btw). The first toolhead I set up was the 38 Special case reconditioning. I tried two configurations. The first was a universal decap, then the resize (decap pin removed), and then the flair die. This worked well, but the universal decap die tended to fling the primers so hard the catcher couldn't restrain about 1 in 5, or so. So I took it out and just used a two die system. The resize/decap die would still fling the occasional spent primer, but only about 1 in 10 or so. (On my single stage, about 1 in 20 go flying onto the floor.) I can live with 1 in 10, I guess.
I intentionally left 250 cases vibra tumbled and ready for reconditioning for the new press. Once I worked on my ergonomics and got myself into rhythm, I got them banged out in no time. After 31 years of doing it in two sequences on a single stage, it felt odd when I was finished in one. I felt like I needed to run them through one more time with the second die, but it was already done. Ready for SS pin tumbling with just one trip through the press. A different feeling for me.
Then I set up another toolhead for the loading side of things (38 Special - 148 lead DEWC, 2.9gns Bullseye.). I set up the stations as a seat, taper crimp, and then a Lee FCD with the crimp mechanism disengaged - i.e., its only purpose is to remove case O.D. anomalies that may rarely occur. Basically, I just put in the FCD because I can. I loaded 100 rounds and it went smooth, fast, and easy.
This is going to be a busy weekend for me, all my brass is prepped, and I have tons of ammo loaded. Point is, it'll be a while before I have any need (or time) to get back to it. But the 550 is all set up and ready to go. It works exactly to my expectations and will save me lots of press stokes and time. I'm happy.