My personal opinion: Lobbying, at least as we know it today, should be illegal. Granted, I'm not quite sure how you'd get rid of it -- but at a minimum get rid of members of Congress being able to get a free meal or trips, or other gifts, from individuals/groups who are trying to influence federal policy. I also approved of Trump signing that EO, to ban lobbying, and am frustrated that he removed it on his way out of office.
What is worse, since many of Trump's administration have likely already accepted new lobbyist jobs, while I would hope Biden would create an EO similar to Trump, to ban lobbying, unfortunately it is unlikely to prevent those that served in previous administrations from "keeping" lobbyist jobs.
Better yet, though this becomes very unlikely, I'd love to see Congress pass new laws limiting lobbyists and their access, as well as the gifts, and preventing former members of government from becoming lobbyists.