Ability to display priority as a numeric value IN ADDITION to color priority.
Seriously, what task list doesn't have a numbered priority setup? Without it, Checkvist is a dinosaur on steroids, an extremely high-quality archaic listing system. To make it more of a project management tool, a basic requirement is to have the ability to add numbered priority that will show as a bolded smaller number to the left of each task line, and to be able to show a non-destructive "sort" by priority number, without affecting any colored tasks. Along with this is the need to recognize that color is not always used for priority. I use color for other reasons, such as scheduling or what I'm doing today, and not for overall priority in the scheme of the entire list.
Thanks for the comment. Unfortunately, we don't plan to separate priorities and colors in the nearest future.
What is closer to the implementation is a way to tune colors of different priorities. Also, using advanced CSS, it is probably possible to add priority numbers near task names.
As for setting 'today' tasks, I suggest you to use built-in "due date" feature, so you can mark your today's tasks with 'td' keyboard shortcut or use 'dd' to set a more specific due date.
Hope this helps,