A number of planes as well as vehicles have been wished for and received, but if the game lasts long enough all of those should be answered anyway.

We have gotten a few maps removed, and then returned,

but that is more of the players as they are the one rebuilding the maps.
Some game play mechanics have been changed. Dar due to NOEs, base capture order to direct combat, HQ/depots made into a mega complex, a number of changes having to do with the split arenas with Lusche's being the biggest and best of them. Tweaks in the hangers and setup stuff, the ability to split game sounds and vox to different speakers.
There have been lots of thing either directly added from the wish list, or tweaked by HTC first then added as something else.
Why do you ask?