I think the role of the JCVI is to prioritise based on actual evidence of risk rather than putting value judgments on jobs. That said, I doubt they'd have the nerve to prioritise restaurant staff over first responders - the PR hit would be too bad and it's better to close the venues instead. Nor do I think they'll actually go with prioritising men over women, if only because a lot of women have hidden second "jobs" as family carers etc, or are only at lower risk because their job has been curtailed in the past year (like teachers who didn't have face to face students for months).
Certainly though I won't be surprised to see them throw some new priority weightings into the schedule. Over 50s being prioritised based on job risk or key worker status being placed ahead of a more simplistic pure age based model that drives the schedule now, and would put the over 60s ahead of them. And as I type that, I see my place slithering back even further in the vaccine queue