NewlyRetired
Footballguy
yes you are correct.The 1970s NASL (an old Pele on the New York Cosmos, etc.) had 35-yard lines that served the same (?) purposes as the blue lines in ice hockey. That legalized some kinds of offsides.
There are many ideas out there on how to adjust it(it can't be eliminated). Even FIFA has experimented with some ideas in youth tournaments but never has pulled the trigger.
The only adjustment we have seen to this critical rule in the past 25 years was to make even with last defender be onside instead of offside.