Has any terminal emulator had a formal security audit done for it as I'm not aware of any that have. If there has let me know, would love to read the report and recommendations as I imagine some of them would be broadly applicable.
There is an option for the blink mode in the preferences under Profile (i.e. Default) since it can be configured on a per profile basis. You can set the blink mode to use the system setting, on or off.
Tilix has an option to control the terminal titlebars style to make it smaller or hide it completely. One of the screenshots on the web page shows it without the terminal title bar.