Hi Harsh,o
Congrats for the ecas status change..When you submit your full application to the local visa office, the office will review your eligibility against 38 occupations based on the employment documents you have provided. Remember, when you filed your initial application to CPU Sydney, they assessed your ability solely based on the information you have provided in your application form and they have not seen any employment documents. Hence this reveiw again at the local visa office level.
The status change is natural and now your application will be processed and points will be calculated. If you score enough points, they may make necessary enquiries and if every thing is ok you will be issued medical and PPR instructions. So everything is positive and you can hope for the best.
BTW, what is your NOC, visa office and when did you submit your full application to the local visa office?