Interesting replies all! I'm glad to see that 'm not alone in my thinking. Tom, a question about those floating points, do they reduce stalling?
I suspect I'll leave my current layout as is, rather than do any upgrades. The current layout was built when when I was still a kid, and Fasttrack was new so the old stuff was out there for dirt cheap.
At this point in my life it'd make more sense to just build another layout, since my tastes in operation have changed a bit since then, if and when I ever manage to have a steady job, and move out of my current house and into a new one. But planning is free! So I keep bouncing different ideas around in my head.