I don’t know when and on which wiki(s) you plan to conduct this survey, but you might want to look into DiscussionTools’ new discussion tool. It’s still in pretty early phase (just got enabled as a beta feature on the first three wikis last week), but it supports visual mode (mini VisualEditor), and preload support is on its way, which will work in both visual mode and wikitext mode.
Topic on User talk:SGrabarczuk (WMF)/sandbox/4
@Tacsipacsi, thank you! That's right, this tool works, but I'm afraid that pointing at more options (especially not default functionalities which require users to make more steps) would make the instruction less clear. Anyway, we'll discuss this, because the idea sounds fair!