Empty nest: Trading big house for a smart 2BHK

Super area is the biggest trap in Bengaluru real estate, especially with pre-launch offers. Builders like Prestige Group inflate numbers, making the per sqft rate seem low. Kids moved out, selling our big house near Majestic. Chhota 2BHK dekh rahe. Is ready-to-move always better to avoid these hidden charges, or can you negotiate true carpet area in pre-launch? Disagree? Tell me why.