Thankyou qeshmk and idliman for your valuable advice. I spoke to my immigration team for down porting to EB3. I explained them in detailed steps that if they downport me in EB3, my son age will be extended by 8-10 months because of I140 processing time (as per CSPR). I will go ahead and file the EB2 I485 and EB3 I485 if my company agrees to downport based on my circumstances.