Maybe... But the rules changed almost every Olympic cycle from 1988 to 2016 and those rule changes were universal to the style. 1 5 min period, must score 3 points or the match goes to OT, must win 2 out of 3 periods, ball grab, clinch, push out rule, shot clock, referees decision, etc etc. when freestyle rules changed its like the entire style gets completely overhauled. College/HS changes haven't changed the foundation of the style where as Freestyle changes absolutely have.
But you're right.. the past decade of freestyle has been pretty consistent.