Completely agree with the full page reload comment. We’re working on loading new data with an AJAX request, but in the interim this is our only option. I can go into more detail if you’re interested, but suffice it to say the limitation has to do with some long-running product decisions we’re slowly trying to work our way out of.
Regarding instantly applying search results on tab/mouse out, that decision is somewhat tied to the full page reload issue. If it were AJAX, users would see updates very quickly, and could modify their inputs easily. Since we’re not using AJAX, having the page reload every time you click out of an input became quite an annoyance.