I did not say, that this will not come, but we are going to end nowhere, when we do not go step by step.
It is not only about the tree, where we've seen some possible solutions.
There is also the iFrame hell for modules, that do not resize in all browsers. And without iFrames, we run into modules, that won't work any more without changing their code.
Please, no mootools again, I've them at my job and I'm glad, that there is a developer, who has to work on them, but I fear, I end to work with that code. OK, I will get money for that pain, but...
Btw, there is a beta of
http://modx.com/extras/package/elrte for Revo. Haven't you, Susan, said, you want it? Though it should be easier, to get it for Evo with the knowledge of the Revo implemantion