Who thinks it has improved over the years? Who thinks he got lazy and never recovered?
Everyone seems to worship Hooky and barely acknowledge Bernard's playing, but arguably a major portion of the best and most popular NO songs (excluding those among casual fans) are guitar driven, or equal parts guitar and bass:
Ceremony, Temptation, Age of Consent, Leave Me Alone, Lonesome Tonight, Run, Dream Attack, Regret, WFTSC, Turn...just to name a mere handful.
I think his playing is most distinctive from '80-'86.