In Vivekachudamani itself the Acharya has made this explicit in another place.
He doesn’t talk of it as his opinion alone.
He says the commandment of the Veda itself is this: (Shloka 46/48)
mukter-hetUn vakti sAkShAt shruter-gIH /*
A basic shraddhA, over and above it a mix of Bhakti yoga and dhyAna-yoga – which means dhyAna yoga in which the Bhakti attitude is imbedded - this is what leads to mukti for a mumukShu.
Thus says the Veda itself.