NAIPv2 is an efficient and unbiased framework for estimating the quality of scientific papers. It uses pairwise learning within domain-year groups to reduce the discrepancy in reviewer ratings and introduces Review Propensity Signals (RTS), which probabilistically integrates reviewer ratings and confidence. Trained on the NAIDv2 dataset, which contains 24,276 ICLR submissions, it enables efficient point-wise predictions. NAIPv2 achieves state-of-the-art performance (78.2% AUC, 0.432 Spearman error) while maintaining linear time efficiency. Furthermore, it generalizes strongly to unseen NeurIPS submissions.