This isn't about the function, exactly, but I wish it was possible to copy and paste the relationship estimates from the screen when I'm looking at the Custom Cluster results.
As it is, I have to hover my mouse over the little box to get the pop-up text, try to memorize something like, "1/2 3rd cousin 1x removed or 4th cousin," click my mouse in another window or slide it over to my other monitor and click that screen to get to my database... and by that point, I can only be certain that I've remembered the first part correctly. So I have to do it all over again, in reverse, to get back to the Ancestry screen and hover over the little box, then back to my other screen, to type in the rest of it... Multiple times over for shared matches with one person. I find that to be a bit onerous.