Please add more feedback or information about who included workers are (i.e. all included worker ids) when that feature is used and inform requesters about the number of participants who will receive emails through the "Email Included Workers" functionality before emails are sent.

Allow the option to close studies at certain times of day/week. Also all for a timed start of studies and send email notifications to included workers on launch

Open HITs with different qualifications to better represent the US population. E.g. allow users to create a study that matches the census for region in US, gender, ethnicity (as is supported in Prime Panels on TurkPrime already)