In Setup > Hosts allow for whitelisting of specific domains only, instead of having to go in and constantly delete domains that shouldn't have access to your account.

After setting the data source for an A/B Test from Production to either Staging or Development, have that selection stick and not keep resetting to Production when you come back to the reporting.

I would love to see this made possible through page parameters, a javascript bookmark, or some other front end means. This would help with the QA process once a test goes to production and with integrating Target with other third party tools like session replay, heat maps, etc.

I would like the ability to set up custom code for MVT variations similar to a regular A/B Test and not have to rely on the WYSIWYG interface tool to hide/show/etc.

I would like the ability to type in page element css selectors manually and not have to rely on the interface tool to select the element.Currently, It's difficult to tell what element you have selected in the process of choosing it and even after it's chosen.