Am I the only person that consistently has trouble with trackpoints? Every time I try to make a large movement I get halfway across the screen before the thing decides it's drifting, tries to correct, and sets its new zero at the edge of physical travel. Then I have to take my finger off it, wait thirty seconds for it to re-zero at physical neutral, and try again, this time remembering to zig-zag so it doesn't think that my inputs are spurious drift.
Have you tried a different trackpoint cap? Some people find a different shape (flat vs domed) makes a difference. But some people just don't get on with trackpoints.
Trackpoints give me RSI almost immediately. I've not had this problem with other forms of input for a long time.
The only one I liked was the Toshiba Libretto, which had it on the side of the screen bezel so you could work it with the finger most adapted for fine movements - the thumb.