I was a heavy user of Delphi from when it first appeared in the 1990s until 2010, and I can't remember ever being annoyed by a UX change across all the versions I used over all those years, so thanks for your efforts! I guess this is one of those things that you only notice when someone doesn't respect it, like in this case (or Microsoft feeling obligated to do a UX refresh for the bundled applications with every new Windows version), but when you notice it, it annoys you even more...
That was before my time, so I am the wrong person to thank! :) But I am in weekly contact with at least one PM overlapping that time so I will pass that on. Kinds words, I appreciate it.