ifleeplanes,
The answer is a qualified YES, but it depends upon Company Policy, and Company Policy must be approved by the relevant regulatory authority before incorporation of that policy within Operations Manuals. After approval by the authority, it then becomes "law".
Our Ops Manuals prescribe a similar 'loop-hole as yours, i.e. renomination of the Alternation as destination and 'divert' to the new alternate (the intended destination). In a fuel shortening situation they also allow us to proceed to the original destination if within 60 minutes, actual forecast and weather trend are above minimas, the airport has 2 independant non-intersecting runways etc. etc.
Regards,
Old Smokey