divorce in progress how can i retain my rights plz help

Dear all, hope you're all well,

background
student visa 09-2001 for 1 year
student visa renewed till 11-2003
married my EEA wife 12-2003
residence card issued 12-2004--->12-2009

Retention of rights of residence,

my residence card will expire in December,
my divorce is at the tribunal awaiting for the decree nisi to be pronouced, but my ex EEA is abroad and has been since we separated about 2 years ago, 10-2007
The update; she will be back to the UK for studies in January for about 3 months or more, so will be exercising treaty rights, at that point of time.
Now should I cancel the divorce proceedings all together and reapply in january, (because she was not in the country when divorce proceedings were initiated) or should I get the decree nisi now, and get the absolute when she's here 'qualified' Because it only matters when the absolute was pronouced ?

Please advise, and thank you for your time.

Best Regards
M