I can see how one would just be interested in 'the ending of suffering', and doesn't need to go much deeper. But then again, what is suffering? That's of course the question then. Would consciousness still be suffering, or wouldn't it?.. And so how much do we need to let go?
But depending on how you define metaphysics, there also isn't really anything metaphysical about nibbana being the end of existence. You can get an idea of what it is, without experiencing it. For me it has always been so straightforward and yet challenging answer, it almost had to be true. Makes this heart jump inside, if you know what I mean. It's like a 'truth detector'. A 'featureless consciousness' just never rang the same bell and I can't imagine the Buddha ever having meant this as the end of suffering.
Then again, if our paths slowly but surely take us onto higher peace, that's the road we have to take. If we notice anywhere our points of view are causing a block, then it's important to question them once again. Until then, there is much work to be done. Nomatter what our points of view are at the moment.
With loads a metta!