The word roots of Rasasvada mean taste of appreciation or pleasure. In this context, the term means the taste of bliss, where bliss is experienced right in the sense of taste. This is related to soma (amrita) as both are produced in samadhi, hence some refer to rasasvada as ‘sipping of juice’.
While this quote suggests we experience bliss in the absence of thought aka samadhi, this is just how it first comes. Later bliss becomes a much more ongoing experience, along with rasasvada.
However, some do observe that pleasure can be a barrier to going deeper. But as this arises naturally in deep peace, this hindrance is normally brief. The samadhi process itself is not personally controlled. It simply goes where it goes so we have little to concern ourselves.
Rasasvada is also associated with healing as the deep peace and happiness can be profoundly healing and gives the opportunity for the release of deep resistance, what had once fed the noisy mind. In other words, the more we enjoy samadhi, the more we get. Ditto for rasasvada.
The net result – sat chit ananda aka nirvana. Rasasvada ongoing.