Is the failure to perform prayers on the nights of Ramadan, and instead suffice with reciting the Qur’an and supplications, considered a mistake that diminishes the reward, given that a greater sense of humility (khushu') is achieved in reciting the Qur’an?

Reciting and pondering the Qur'an is among the best forms of remembrance (dhikr) and worship, especially in Ramadan. Jibreel used to review the Qur'an with the Prophet, peace and blessings be upon him, every night in Ramadan. Reciting every letter of the Qur'an grants ten good deeds, and the Qur'an will intercede for its people on the Day of Resurrection. The Qur'an is the best of all remembrances; through it, hearts are eased and humbled. Standing in prayer at night (qiyam al-layl) involves all acts of worship, including remembrance (dhikr), supplication (du'a), Qur'an recitation, and prayer (salat). If a Muslim combines prayer and recitation, he combines two good deeds. If he limits himself to recitation with humility and contemplation, that is abundant good and great reward. Reviving the night by reciting the Holy Qur'an is correct and contains much good.