I’ve read (very) extensively both works about and by Merton. A case could be made to support what you contend, and I’m not completely sure you’re entirely off the mark. However, there is another take.
Merton was completely orthodox. He broached a dialogue with the Buddhists because he saw a commonality of contemplativeness and general spirituality there. I don’t think he himself knew where it would go but he did not believe it would go nowhere. It would no more have occurred to him to accept the essential Buddhist doctrine of reincarnation than it would have occurred to him to accept that the moon is made of green cheese. He was an extraordinarily cultured and committed Catholic.
The stodgy wing, if I may call if that, of the Traditional movement dislikes Merton because he did buy into the Novus Ordo, but one has to remember that he objected to the throwing out of the baby with the bathwater as strenuously as anyone who did not in fact become schismatic because of the abandonment of, for instance, things like the Latin Psalter, which he called himself “demented enough to love.” The monks who were his colleagues, who unlike the Solesmes congregation of Benedictines, were not specialists in the ancient and highly demanding tradition of Gregorian Chant, had to spend many hours (at least on special occasions) preparing even adequate performances of the chant, which most of them, as relatively uneducated men in those days, still did not understand very well, pronouncing the Latin phonetically and badly at that. This detracted from their contemplative life, as did the noise of the farm equipment, which Merton also railed against (Trappist monasteries have generally since ceased to try to be modern farmers). The simplicity of the very modified chant used by many monasteries today would probably have pleased him, but somehow, though of course I cannot be sure, I doubt that compromise with Philistine and non-liturgical parish practice would have.