You're not thinking clearly...
Tomes are completely different... It's not unfair that you have a +3 tome and I don't, because I can get one someday... My 28 point character however, can never be a 32 point character...
I fully support a mechanism that would make existing 28 point characters get 4 extra build points AFTER they get the 1750 favor... They would still have to do the work, and make the effort, but then the character who did all the work could enjoy the benefit....
Nothing wrong with that at all...