We allowed Characters to buy off Flaws with the Talent Points they gained with XP levels. However, they had to give a good explaination or, more accurately, role played the buy off of a Flaw. Also they had to role play the gaining of a Talent.
We gave Characters TPs as follows:
For every level above 1, characters gain +1 TP, with an additional +1 TP at every fifth level (5, 10, 15, etc.). Characters may accumulate TPs, spending them when desired. If wanted, a Character may turn over the TPs to the GM for mystery spending. Just because one Flaw is bought off does not mean that that Flaw may not become another Flaw.
For example, quoted from my site,
Remember, one flaw may be bought off with another flaw.
Example: If you have a Lesser Dependent (for -5 BOPnts) and that Lesser Dependent is killed, then you may in turn buy a Lesser Vow (-3 BOPnts; to kill Lesser Dependent's murderer).
Of course, this combo would give you 2 BOPnts.
But, if you decide on the Minor Vow (-7 BOPnts) and spend two accumulated BOPnts, this is also acceptable.
Losing a flaw does not necessarily mean you do not gain another flaw.
rmfr