IMO it is worth saving as much as possible since after retirement there won't be much more than whatever pension you have, to live on.
At 62 it seems a little late to be considering the situation, but better late than never I trust. IMO whatever little you project you will get out of it (and your employer should be able to show you the predicted income) it has to be worth it. Although only you can put the figures into the spreadsheet, create the graph, and get a feel for your particular situation.
At the amount the bank pays these days it be EXTREMELY unlikely leaving it there would be best. Ad that would be the case even if the banks started paying a realistic rate because pension schemes play the same markets and the employer adds their share.
Anyway, I was under the impression that unless you put money into a private pension scheme then the employer was legally obliged to enrol you into theirs.