1 year- 5 rank increase
2 years- 10 rank increase

6 years later...

Outcome- 30 Ranks/Levels which Equate to Rank/level 80 in 6 years

It took FFXI about that much time before they increased it to level 99 >.> lmao

so really when you look at this.. if they do it like what I described I don't see a problem.. but then again its my opinion so =)