(I'm guessing that the HTML edit control is part of Community Server (which powers these forums) but I really don't know. Ha ha. There are several edit controls like this out there on the web that you can consider using.)
Regarding the issue of supporting JavaScript client-side processing better. I'm more than happy to engage in a discussion of this with you and to add appropriate and safe "hooks" into the adapter kit to make it easier for folks like you to get your job done... whilst using the adapters. But I need you to coach me along a little bit.
First, can you describe exactly what you want the user experience to be in some canonical (typical) case where the adapters today are insufficient.
Next, tell me what you know about how others have provided the sorts of hooks that you found convenient so you could add your JavaScript and do what you need to do.
Finally, if you have looked at the kit's source code for the adapters or even just its rendered markup... would you like to give any suggestions for specific code/markup changes you think we could/should make to the kit. This, of course, is the most direct way to suggest exactly what you want or need... but I recognize that you may not have the time to dig into the problem that deeply. I just want you to feel assured that I'm perfectly happy to consider any improved code that you wish to submit for use in a future rev of the kit.
Of course, I'm very glad to hear that you considering using the adapters in a project soon. Best of luck with that. Keep in touch.