Noida pre-launch: Was I fooled by Ambesten Homes?

Pre-launch offers are such a sham, I swear. I'm currently in a 2BHK in Sector 7x, planning to upgrade to a 3BHK around ₹1.5 Cr. Ambesten Homes ka project dekha tha Sector 140A mein. Pre-launch mein bola tha bahut discount milega. Book kar diya tha with an EOI amount. But ab official launch pe they're giving similar spot discounts, and some brokers toh better deal bhi offer kar rahe hain. Matlab, what's the point of booking early? Is it always better to wait for the official launch and negotiate hard? Yaar, yeh builder log kya game khelte hain? Should I try a broker for my 3BHK now or stick with the builder directly? Is this common for projects banking on Jewar airport appreciation?