In Drupal, two custom block fields will no longer be functional: field_button_size and field_button_style
Instead, the plain text field_custom_classes can be used to manually inject the style classes
There is now the option to also style buttons as round or square
True <button> elements have different styles than <a> elements with the button class
Testimonials and image buttons have received new styles
New quote style available, along with a custom block type for it
There is also an additional testimonial style that can be used by adding the "testimonial--full-page" class to the custom class field on testimonial blocks
Additional font tweaks made, "title-font-heading" class is now available
Statistics and statistics collection styles added
Styles added for creating half & full page blocks (these span outside of the normal maximum content area)
Classes & styles added to easily use images in blocks as backgrounds, and to add colored overlays to them (see pattern lab atoms)
Secondary site name can now be used as a custom block