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I will say here, there are multiple aspects to this.  Like in the case of
OSI, there are layers and different aspects that need to be worked on. 
There is the bit level.  There is the notation level.  There is the
uniformity in what labels mean also, and the same with what board positions map to one another. 

The interest here is to get different sites to coordinate their efforts
and agree to what they want to use.  I do believe that what is out there
should be used whenever possible.  If there are shortcomings, such as
games where you have stacks, piles, and regions, then these should be
dealt with also, through extension and tweaking.

The main thing is agreement and implementation.  Not rationalizing reasons
for not doing things, but having things done.  From an IAGO perspective, there is an interest in what is being done work with all abstract strategy games, not just chess variants.  My personal druthers would be that it could be extended to cover all boardgames and cardgames, so what is done will get adopted.