For the carousel header block, it would be nice to have the option to add a second button to each slide. I was able to achieve this for GPCA by copying the carousel header block from the browser dev tools along with a couple of necessary script tags, duplicating the existing button on one of the slides, and pasting all of that code into a custom HTML block on the page in P4. It works, but is obviously a hacky solution, and sometimes causes bugs with the header navigation menu, especially on mobile.