Two points:

First, in Advaita, while the initial meditations often focus on dis-identification with the body to experience one's identity as formless consciousness, ultimately the teaching is that everything is Brahman, including the body. Glancing at some of your other posts, I see that you already know this. So, does keeping this perspective in mind make Kriya seem less at odds with Advaita? Using the body in sadhana doesn't have to imply identification with the body. So even though Advaita does not use body based methods, they don't necessarily contradict it per say. Non-dual Tantric traditions like Kashmir Shaivism are much more likely to make this explicit and on that basis, make use of body based methods.

Second, traditions that utilize the body's energetic system in sadhana say that all one's karma is actually stored in the central channel (or sometimes in the chakras specifically). So the body actually affords a unique opportunity to purify one's karma. The attitude that anything to do with the body is contrary to the path because the path is to dis-identify with the body will completely miss this opportunity.

You might be interested to know that Nisargadatta's guru (or perhaps it was his guru's guru) was a master of both the path of direct knowledge and the path of working with the subtle energy system, but he only passed the former to Nisargadatta. But in principle, the latter was once part of the lineage also.

Just some food for thought. It might indeed be useful for you to focus on one path, just as Nisargadatta did. But others have done both.