So, I have a wordpress site with over 12,000 posts that i created about 3 months ago. At one point this website had 2,000 pages indexed by google without me doing any link building or anything I just made that site and that was it and recently I have decided to make this site into a big site of content like my other site who has all of its pages indexed. What happened was that I decided to change the theme and and keywords completely and now the sites pages keep getting indexed even while im getting traffic in the 100s(uniques) a day from direct, referral now it only has 245 pages indexed. How long do you think that Google will start to re index my pages? - Edit, I changed it to a completely new theme didnt make changes to the other one.
Do you still not building links for it? Better start it but carefully so you will continue to be loved by google...