Well they could always have the WoL die in 3.X MSQ so new characters in 4.0 can choose to start in 2.0 or 4.0 when 4.0 is released.

That way players who choose to start in 4.0 can have faster access to 4.0 and older content faster without needing to go through 2.0 to 3.X MSQ since their new character is a new Adventurer who started his or her adventurer in 4.0 era.

but that is just wishful thinking at this point since SE so far wants content to be locked behind 2.0 to 3.X MSQ and new players must enjoy the MSQ at their own pace or try to burn through it as fast as possible to reach 3.0