Hi, it is a difficult question to answer as we are not all exactly the same, eg, some diabetics with terrible long term sugar levels don't get any signs of neuropathy yet others can get it a prediabetic levels.
I think with alcoholic neuropathy they test for low levels of thiamine [B1] and usually a poor diet, but saying that the above still applies, I guess the only way to tell for that particular person is to stop the alcohol completely and see what happens.