Saraha and Virupa don't "object" to those practices--they are indicating that they are often mistaken for the actual "Mahamudra," which is, in fact, a "result." But just because Saraha's song, for instance, talks about being misled or losing one's way in bliss, etc., doesn't mean those techniques are not valid methods on the path to the result. I guarantee that those methods were valued by Saraha and Virupa, and the other Mahasiddas as well.
In terms of pedagogy, of course Kagyu lamas talk about path Mahamudra, and I assure you that Namdrol knows this. It can be said, really, that ALL practices taught by Kagyu Lamas are really practices on the path of Mahamudra (unless they're teaching Dzokchen, but let's leave that alone for this discussion....)
Briefly stated, Kongtrul devised the threefold classification of Mahamudra "paths:"
Essence Mahamudra is for a very small number of disciples who have the karmic propensity to practice based entirely on the Pointing Out Instruction/Descent of Vajra Essence Empowerment. Of course, this is a transmission from the Guru.
Tantric Mahamudra includes Deity Yoga, and the completion stage yogas--the Two Stages, as Namdrol points out.
Sutra Mahamudra is basically a graduated series of Shinay and Lhaktong instructions, and ultimately a combination of the two, separate from the Two Stages--though Guru Yoga and the other preliminaries are included, and therefore it could be said to be Tantric, actually. This is the innovation of Gampopa. Some Sakyapas love to criticize it, from a polemical position. Regardless, it is a widespread and effective method of pedagogy--very beneficial for vast numbers of beings.
From the point of view of Kagyu Lamas, these are spoken of as Paths. If you look at them, these three divisions really do incorporate all the vast methods and techniques that are taught by Kagyu Lamas--everything from Lojong, Tonglen, Shinay, to Deity Yoga, Tummo, Dream Yoga, etc. But in reality, the ultimate definition of Mahamudra is the Natural State, Suchness, Ultimate Reality, etc.