Development starting: Roads, utilities (electricity, sewerage, water), and other basic infrastructure are beginning, so you can get in at a lower entry price before full possession and completion drive up values significantly (common in growing societies like this).
Linked to Phase 1: Being adjacent/connected to the more established Phase 1 gives it better accessibility, proximity to existing amenities (wider roads, mosques, parks, security, and nearby Cantt/V-Mall area), and higher future appreciation potential once development catches up.