A hepatologist from the Gish group told me that 6 years for a stage was the average. it sounds like you moved a half stage
in three years depending on where
in stage 2 you are. It could be better, but it could be much worse as you know of course.
I had a biopsy 11 and 6 years ago and was grade 2 stage o on both., This year stage 2.5 grade 2-3. The same Gish team doc told me that he thought that 6 years ago was a sampling error which seems not to be that unusual as people might think.