Whilst I would love to share what I have, I really have only hacked together a solution for myself, and my solution isn’t even complete yet (mainly due to issue here: How to associate tiles in different layers (isometric)?). If its ever working well I will be sure to upload what I have.
Of course there are some other considerations:
-Tiled itself isn’t fully compatible with all isometric styles and goals.
-Indeed, no engine is fully compatible with Tiled isometric.
-Most engines are missing critical features for beyond very basic isometric support.
-The nature of isometric is exceedingly complicated, and there are different goals for every game therefore making an engine/editor that supports all of this is overwhelming.
Personally what I want to see is more isometric support in Tiled and an Engine that “just works” out of the box with isometric Tiled.