Nishant,
Thanks for the link.
It was to try to get USCIS to complete more cases (generate increased demand by Citizenship and Immigration Services (CIS) for adjustment of status cases) and to avoid wastage of visas (to maximize number use under the annual numerical limit) by allowing DOS to allocate visas to as many CP cases as possible. Generating an Inventory was merely a by-product of not wasting visas.
Also, this was July, the first month of Q4, when limitations are removed. After the event, we know what a disaster that was, so it seems unlikely to be repeated.
A couple of things are different.
DOS now know how many cases USCIS have and USCIS production rates have been sufficient not to waste visas since.
Coming to Q's point, the problem is that there are probably anywhere between 8-18k cases that could be approved if the dates moved forward. The absolute minimum is the 8k demand left at the end of August, which is more than the initial limit.
That means DOS cannot move the date beyond August 15, 2007 until there are enough visas available to cover that date and then some more. By the time that decision can be made, at least 6 months will have elapsed and we can add on another 2k Porting cases. That means more than 10k visas would be needed. If we start with 5.6k visas initially, that means more than 4.4k need to be available to move beyond the backlog.
If that was done in the first month of Q3 (April 2012), then more than 5.4k additional visas would need to be announced. To also account for PWMB in that period would need more than 9k visas to be announced.
To move to October 2007 would need 21k visas to be announced. Given that we might expect quite strong performance from EB1 and EB2-non IC initially, then even 9k would be a very good result.
That really means any substantial movement would need to wait to July 2012, if the law is to be followed.
I agree with you that DOS may not necessarily follow the law religiously. That will possibly create a problem.
There is an EB universe beyond EB2-IC. Others will be looking to make sure that DOS do follow the law.
Whilst no-one in this forum is guilty of this, a certain section of EB2-I in other forums have delighted in rubbing EB3 noses in the dirt about how the revised spillover interpretation is just following the law.
If following the law also has a deleterious effect on EB2 at some point, then EB3 will just say "what is sauce for the goose, is sauce for the gander" and that the law cannot be bent or broken to benefit a particular group.