The new Icons for Buttons are great and are saving a lot of space on Views. However they do raise the requirement for a Help section in the Button configuration form. This help text should then be available as hover text, similar to the ? beside columns on forms.
This would be an amazing addition.
Short term work around would be to just make the Button Label appear when hovering over the Icon. Just for those users who cannot work out icons
Other, less urgent addition, would be to allow Hide Text to be separated into Table View and Preview Page, so that just Icons can be used in Tables and the full Button Label with or without icon can be used on Preview page.