In that case the limit should be on the auto slug field. If the name is too long, it should just stop at 60 (if that limit is really necessary and could not be removed at all or extended), and that way I could easily enter my full title and don't have to duplicate things.
I already tried adding an extra field for name before, and that could work, but we would still need to enter it on both fields, in order to have them display correctly on the items list and be able to manage them. It would be great if the suggested change could be possible.
No limit on dynamic pages is great.