Whole SVG sprite can be replaced if needed.
https://www.directadmin.com/features.php?id=2364.
Regarding individual icons - can be changed using "Customize Evolution Theme".
"Merge Access Levels" - will be removed from user "skin options" very soon, will update the thread. It's minor though, as it just doesn't do anyting when you're an end-customer
Plugin icons - as we only had ~16 hours to design, discuss, code, test and release the Icons Grid layout for public, as we've seen a very high demand for it, it's going to get improvements for sure. One of the - ability for plugins to ship with their own icons
We've released a fully functioning version to show what it might look like. We're likely replacing ~8 of the previous icons this evening we think would be better for the 'vintage' look and feel, minor change though.
We're looking forward for the feedback (positive/negative etc.) - your opinion really counts. Thank you for this!