I don't think the suggestions for redefinition of the ticket office clerk role at smaller, single-person staffed stations are bad. I'm sure the people who work in these roles would object to the idea of 'introducing' duties other than selling tickets to the role, given they already perform a great many other duties. Nothing wrong with modernising the job titles and job descriptions to formalise and maybe expand the other duties in recognition of the reduced demand for ticket sales, though, I agree.
A call button where passengers can contact staff without having to go and find them would be a good idea, but that doesn't necessarily have to be a separate dedicated help point. A button on the passenger-facing side of the ticket office counter would be cheaper to install and would do the same job. At two-platform stations, one call button in the ticket office and a separate passenger help point on the platform on the opposite side might be a winning formula, particularly for those for whom crossing over is difficult.
I don't really see what the advantage is of removing the ticket office, though? It would only really save significant money if you downgraded and casualised the role and no longer trained people in railway ticketing, which what was proposed (and in some places implemented) a couple of years ago and is a recipe for bad advice.
Also, many of these stations only have one TVM and, being in or around Greater London, you do still get a lot of people making longer journeys and buying online using TOD because their ticket has cross-London validity. The stations only have one TVM. Therefore if you remove the ticket office, you no longer have any redundancy for TOD collection if the TVM is on the blink, and the passenger is screwed. So it may be that one does want to close those ticket offices, but it should only happen when the ridiculous nonsense of making people use TOD and CCSTs for a significant proportion of tickets sold in the Greater London area finally comes to an end.