There is no matter what is on disavow list for visits. Links stayed open, just will not being considered by google. Rankings may drop after this act, but you had to analyze what in fact you want to disavow.
Usually, during weekends visits are decreased

Google started ignoring most bad quality links a few months ago, so much so that we stopped insisting that all our new clients order a bad link cleanup service when they signed with us for SEO.

There is another update going on at the moment which has something to do with linking profiles so maybe you are being hit with that.

Is there anyone who has removed a disavow since Oct last year and seen an uplift in traffic?

It still has not been determined what the latest major update to Google's algorithm was and what caused so many sites to fall in the rankings. Barry Schwartz thinks it targeted low quality/duplicate content and heavy AdSense sites, although some of his data suggests otherwise. Since the major discussions about massive traffic/ranking drops has been going on in black hat forums, I tend to think that it is link-related. Either way, I'd agree with Stanton that it is likely more related to that than to a disavow file.

It has been many years since we have had to disavow links, so I cannot tell you definitively whether doing so does a thing to help/hurt a website (I know it never seemed to really help in the past). The only thing that seems to help is building more and better links to smother the bad ones.

If you want to know for sure, revert to the previous disavow file and see what happens.