Thank you for the insight, it is appreciated. I did inspect the bushing area, and it was quite clean, on the bar. Almost new.
The previous bushings I had on it, a year ago (presumed Nissan ones), seemed a bit smaller and had a lot less rubber to them. Could just be the age. I recall vividly last year, when I changed the bushings out, the sway bar would just fall into my hands once disconnected from the links.
I recall that it was a real struggle to get the newer Nissan bushings on last year. I never thought too much about it, until I did the control arms a couple of weeks ago. These were the split type that you mentioned, with the updated design. When I tried to move the bar, I had to wail on it, and I expected after a year of use, they should have some movement. I mean - I would have to to leap onto it from height to get it to rotate. From that assertion, I thought there must be something wrong.
Today, I swapped out to the Moog (I will keep the Nissan ones), and will monitor how they perform.
They appear to have a bit less rubber to them, and seem "a bit" smaller. I didn't have a caliper to check.