Probably not worth worrying about unless you are trying to work to four or five places. A couple of years ago, I ran some figures to put hard numbers on the diameter errors caused by an error in tailstock height. Assuming no error in tailstock height, then the same figures apply to differential bed wear. The height error that I used was 0.010" (five times your reported 0.002"). With the cutter exactly on center at the headstock end of the workpiece, and in the bed wear case the tailstock vertical error zero, if the workpiece diameter is 2 inches, the diameter error near the center would be 0.0001". The diameter error varies approximately inversely as the square of the diameter. And approximately linearly with the height error. So with 0.002" height error, the diameter error for nominal 2" diameter would be 0.00002. If the diameter were reduced to 1/4", the diameter error would be approximately 0.00128". But that would only be true if the work piece were long enough to put the tailstock past the worn area. Or in the worn area. Neither of which is very likely.
There is also another possibility - that the 0.002" isn't wear but is bed sag. Put the 24" straight edge back on the bed. Put the 0.002" feeler gauge back under the straight edge and move it left and right, noting how far you can easily move it. That will give you an idea of the extent of the main wear, if it is wear. Put an 0.001" feeler gauge under the middle of the straight edge and move it right and left. If it makes contact near the 6" and 18" points, you can mostly or partially correct for that when you mount and level the bed.
