Prof. P. Dog sez: MMY's sadhana is based on yoga practice. If it was Vedantic, MMY would have emphasized the Vedantic notion of maya, which is not real, yet not unreal.
Your view of Vedanta is that it is Maya-vada ... a teaching about Maya. This is a classical misrepresentation that began with Ramanuja and continues today. It infiltrated Vedanta with the works of Swami Vidyaranya, who wrote Panchadasi. Its modern proponent was Vivekananda and MMY just continued that mode – including the division of the Bha. Gita into three topical sections, also found in Aurobindo. This form of interpretation is known as Yogic Advaita and is more about yoga and less about Vedanta. The whole concept of “enlightenment” is Buddhist not Vedantic. Shankara’s Vedanta teaches the ascertainment of one’s own true nature, not chitta-nirvikalpa or Buddhist dhyana-samadhi. The purpose of the teaching is realization of moksha (freedom) - liberation from any experience, whether inner, outer or transcendent.