Nagenokata was intended as one of the Randori no Kata - that is, techniques that might be used in randori.
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Since the powers that be removed kataguruma from competition by by making it illegal to grab uke below the belt, this technique no longer fits the intent of the kata.
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I suppose that you could keep kataguruma as a sort of historcal artifact, like ashigarami in katamenokata. In this role, kataguruma would be a sort of hint to the practitioner that there is more in Heaven and Earth than is demonstrated in this kata.
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But it seems to me that it would be better to just take kataguruma out and replace it with something else that demonstrates a similar idea and is usable in competition...
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Something like... taiotoshi maybe...
